Prof. Ahmed S. Elwakil

All Stories

1. 
   On the behavior of cascaded Gaussian impulse response filters

   Article • AEU - International Journal of Electronics and Communications, February 2026, Elsevier

   Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

2. 
   Third-order single-T and bridged-T LC oscillators and application

   Article • AEU - International Journal of Electronics and Communications, December 2025, Elsevier

   Prof. Ahmed S. Elwakil

3. 
   On the Design of Complex Coefficient Multifunction Filters

   Article • International Journal of Circuit Theory and Applications, August 2025, Wiley

   Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

4. 
   Analog filters based on the Mittag-Leffler functions

   Article • Signal Processing, August 2025, Elsevier

   Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

5. 
   Generalized Distribution Function of Relaxation Times with the Davidson‐Cole Model as a Kernel

   Article • Advanced Theory and Simulations, July 2025, Wiley

   Prof. Ahmed S. Elwakil

6. 
   Approximation of complex coefficient filters

   Article • AEU - International Journal of Electronics and Communications, July 2025, Elsevier

   Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

7. 
   Analysis of a Network of Non-Identical Parallel-Connected Supercapacitors

   Article • Journal of The Electrochemical Society, July 2025, The Electrochemical Society

   Prof. Ahmed S. Elwakil

8. 
   Wideband Signal Generation Using Egyptian Fractions and Application to Instantaneous Impedance Measurements

   Article • IEEE Sensors Journal, June 2025, Institute of Electrical & Electronics Engineers (IEEE)

   Prof. Ahmed S. Elwakil

9. 
   Closed-Form Expressions for the Input Impedance of Some 2-D Fractal Circuit Networks

   Article • IEEE Transactions on Circuits & Systems II Express Briefs, January 2025, Institute of Electrical & Electronics Engineers (IEEE)

   Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

10. 
    Approximation of First–Order Complex Resonators in the Frequency–Domain

    Article • IEEE Access, January 2025, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

11. 
    Implementation and Behavior of Basic Filters Involving the Delay Element $$e^{-\sqrt{\tau s}}$$

    Article • Circuits Systems and Signal Processing, December 2024, Springer Science + Business Media

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

12. 
    Using Intermittent Chaotic Clocks to Secure Cryptographic Chips

    Article • IEEE Embedded Systems Letters, December 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

13. 
    Exact solution for the electrical response of a constant phase element with a series resistance to linear voltage sweep

    Article • Journal of Power Sources, September 2024, Elsevier

    Prof. Ahmed S. Elwakil

14. 
    On the Behavior of a Non-Linear Bandpass Filter with Self Voltage-Controlled Resistors

    Article • Electronics, August 2024, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

15. 
    Fractional-Order Equivalent-Circuit Model Identification of Commercial Lithium-Ion Batteries

    Article • Journal of The Electrochemical Society, May 2024, The Electrochemical Society

    Prof. Ahmed S. Elwakil

16. 
    On the Theory and Application of the Fractional-Order Dirac-Delta Function

    Article • IEEE Transactions on Circuits & Systems II Express Briefs, March 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

17. 
    Power-Law Negative Group Delay Filters

    Article • Electronics, January 2024, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

18. 
    Systematic design of negative group delay circuits

    Article • AEU - International Journal of Electronics and Communications, January 2024, Elsevier

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

19. 
    Bilinear Double-Order Filter Designs and Application Examples

    Article • IEEE Access, January 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

20. 
    Reduced Complexity Approximation and Design of Gaussian Impulse Response Filters and Wavelets

    Article • IEEE Access, January 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

21. 
    Chaos in Inter-State-Controlled RLC Networks

    Article • IEEE Transactions on Circuits & Systems II Express Briefs, January 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

22. 
    Wide Bandwidth Signals for Joint Time–Frequency Characterization of Nonlinear and Time-Varying Circuits

    Article • IEEE Sensors Journal, December 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

23. 
    Time-domain response of supercapacitors using their impedance parameters and Fourier series decomposition of the excitation signal

    Article • Journal of Electroanalytical Chemistry, October 2023, Elsevier

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

24. 
    A New Class of Nonlinear Resonance Networks Modeled by Levinson–Smith and Liénard Equations

    Article • IEEE Transactions on Circuits & Systems II Express Briefs, September 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

25. 
    Field Programmable Analog Array Based Non-Integer Filter Designs

    Article • Electronics, August 2023, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

26. 
    One active element implementation of fractional-order Butterworth and Chebyshev filters

    Article • AEU - International Journal of Electronics and Communications, August 2023, Elsevier

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

27. 
    Tikhonov regularization for the deconvolution of capacitance from the voltage–charge response of electrochemical capacitors

    Article • Electrochimica Acta, August 2023, Elsevier

    Prof. Ahmed S. Elwakil

28. 
    Further Experimental Evidence of the Dead Matter Has Memory Conjecture in Capacitive Devices

    Article • IEEE Transactions on Circuits & Systems II Express Briefs, August 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

29. 
    Electrical Impedance Spectroscopy Using a Wide-Band Signal Based on the Rudin-Shapiro Polynomials

    Article • Journal of The Electrochemical Society, April 2023, The Electrochemical Society

    Prof. Ahmed S. Elwakil

30. 
    A 1 + α Order Generalized Butterworth Filter Structure and Its Field Programmable Analog Array Implementation

    Article • Electronics, March 2023, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

31. 
    Minimum Active Component Count Design of a PIλDμ Controller and Its Application in a Cardiac Pacemaker System

    Article • Journal of Low Power Electronics and Applications, February 2023, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

32. 
    Time-Domain and Frequency-Domain Mappings of Voltage-to-Charge and Charge-to-Voltage in Capacitive Devices

    Article • IEEE Transactions on Circuits & Systems II Express Briefs, February 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

33. 
    Design of Complex-Order PI/PID Speed Controllers and its FPAA Realization

    Article • IEEE Access, January 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

34. 
    Design of Higher-Order Fractional Filters With Fully Controllable Frequency Characteristics

    Article • IEEE Access, January 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

35. 
    Non-Integer Order Generalized Filters Designs

    Article • IEEE Access, January 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

36. 
    Implementation and Experimental Verification of Resistorless Fractional-Order Basic Filters

    Article • Electronics, December 2022, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

37. 
    Fast Sub-Hz potentiostatic/galvanostatic bio-impedance measurements using chaotic oscillators

    Article • Biomedical Microdevices, November 2022, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

38. 
    Approximation and realization of power-law all-pass filters

    Article • AEU - International Journal of Electronics and Communications, October 2022, Elsevier

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

39. 
    Extended RC Impedance and Relaxation Models for Dissipative Electrochemical Capacitors

    Article • IEEE Transactions on Electron Devices, October 2022, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

40. 
    Using Non-Autonomous Chaotic Clocks to Drive CPA-Resistant AES Cryptographic Chips

    Article • IEEE Transactions on Circuits & Systems II Express Briefs, September 2022, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

41. 
    Plant Tissue Modelling Using Power-Law Filters

    Article • Sensors, July 2022, MDPI AG

    Prof. Ahmed S. Elwakil

42. 
    Versatile Field-Programmable Analog Array Realizations of Power-Law Filters

    Article • Electronics, February 2022, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

43. 
    Electronically Controlled Power-Law Filters Realizations

    Article • Fractal and Fractional, February 2022, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

44. 
    Extended Instantaneous Spectral Analysis (E-ISA) for Advanced Signal Processing

    Article • IEEE Transactions on Instrumentation and Measurement, January 2022, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

45. 
    Time-Frequency Design of a Multi-Sine Excitation With Random Phase and Controllable Amplitude for (Bio) Impedance Measurements

    Article • IEEE Access, January 2022, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

46. 
    FPAA-Based Realization of Filters with Fractional Laplace Operators of Different Orders

    Article • Fractal and Fractional, November 2021, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

47. 
    Analog Circuit Design Using Symbolic Math Toolboxes: Demonstrative Examples

    Article • IEEE Transactions on Very Large Scale Integration (VLSI) Systems, November 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

48. 
    Fractional‐order controllers for switching DC/DC converters using the K‐factor method: Analysis and circuit realization

    Article • International Journal of Circuit Theory and Applications, October 2021, Wiley

    Prof. Ahmed S. Elwakil

49. 
    On The Equivalent Impedance of Two-Impedance Self-Similar Ladder Networks

    Article • IEEE Transactions on Circuits & Systems II Express Briefs, July 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

50. 
    Revisiting the Time-Domain and Frequency-Domain Definitions of Capacitance

    Article • IEEE Transactions on Electron Devices, June 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

51. 
    Design of Low-Voltage FO-[PD] Controller for Motion Systems

    Article • Journal of Low Power Electronics and Applications, May 2021, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

52. 
    Power-Law Compensator Design for Plants with Uncertainties: Experimental Verification

    Article • Electronics, May 2021, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

53. 
    Delay-Tunable Compact RC-Only All-Pass Filter

    Article • IEEE Microwave and Wireless Components Letters, May 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

54. 
    Passive approximations of double‐exponent fractional‐order impedance functions

    Article • International Journal of Circuit Theory and Applications, March 2021, Wiley

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

55. 
    Fractional-Order Inductor: Design, Simulation, and Implementation

    Article • IEEE Access, January 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor khaled nabil salama, Prof. Ahmed S. Elwakil

56. 
    Fractional-Order and Power-Law Shelving Filters: Analysis and Design Examples

    Article • IEEE Access, January 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

57. 
    FPGA Realizations of Chaotic Epidemic and Disease Models Including Covid-19

    Article • IEEE Access, January 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

58. 
    Fractional-Order Bio-Impedance Modeling for Interdisciplinary Applications: A Review

    Article • IEEE Access, January 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

59. 
    Pinched hysteresis loops in non‐linear resonators

    Article • IET Circuits Devices & Systems, December 2020, the Institution of Engineering and Technology (the IET)

    Prof. Ahmed S. Elwakil

60. 
    Realization of Cole–Davidson Function-Based Impedance Models: Application on Plant Tissues

    Article • Fractal and Fractional, November 2020, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

61. 
    Active circuit model of low-frequency behavior in perovskite solar cells

    Article • Organic Electronics, October 2020, Elsevier

    Prof. Ahmed S. Elwakil

62. 
    Synthesis of Wideband High-Quality Factor Delay- Tunable Fully Differential All-Pass Filters

    Article • IEEE Transactions on Microwave Theory and Techniques, October 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

63. 
    Extracting Optimized Bio-Impedance Model Parameters Using Different Topologies of Oscillators

    Article • IEEE Sensors Journal, September 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

64. 
    Parallel random bitstreams from a single source of entropy based on nonthermal electrochemical microplasma

    Article • Plasma Processes and Polymers, August 2020, Wiley

    Prof. Ahmed S. Elwakil

65. 
    Fast Spectral Impedance Measurement Method Using a Structured Random Excitation

    Article • IEEE Sensors Journal, August 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

66. 
    Automatic Generation of Differential-Input Differential-Output Second-Order Filters Based on a Differential Pair

    Article • IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, June 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil

67. 
    Implementation of a Fractional-Order Electronically Reconfigurable Lung Impedance Emulator of the Human Respiratory Tree

    Article • Journal of Low Power Electronics and Applications, May 2020, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

68. 
    Wideband third‐order single‐transistor all‐pass filter

    Article • International Journal of Circuit Theory and Applications, April 2020, Wiley

    Prof. Ahmed S. Elwakil

69. 
    Fractional-order electric double-layer capacitors with tunable low-frequency impedance phase angle and energy storage capabilities

    Article • Applied Physics Letters, January 2020, American Institute of Physics

    Prof. Ahmed S. Elwakil, Dr Anis Allagui

70. 
    Reduced Active Components Count Electronically Adjustable Fractional-Order Controllers: Two Design Examples

    Article • Electronics, January 2020, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

71. 
    Single transistor RC‐only second‐order allpass filters

    Article • International Journal of Circuit Theory and Applications, December 2019, Wiley

    Prof. Ahmed S. Elwakil

72. 
    Minimum MOS Transistor Count Fractional-Order Voltage-Mode and Current-Mode Filters

    Article • Technologies, December 2019, MDPI AG

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

73. 
    Quantification of memory in fractional-order capacitors

    Article • Journal of Physics D Applied Physics, October 2019, Institute of Physics Publishing

    Prof. Ahmed S. Elwakil

74. 
    Supercapacitor discharge under constant resistance, constant current and constant power loads

    Article • Journal of Power Sources, September 2019, Elsevier

    Prof. Ahmed S. Elwakil

75. 
    Commercial supercapacitor parameter estimation from step voltage excitation

    Article • International Journal of Circuit Theory and Applications, August 2019, Wiley

    Prof. Ahmed S. Elwakil, Mohammed Fouda

76. 
    Single transistor fractional-order filter using a multi-walled carbon nanotube device

    Article • Analog Integrated Circuits and Signal Processing, May 2019, Springer Science + Business Media

    Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

77. 
    One-terminal electronically controlled fractional-order capacitor and inductor emulator

    Article • AEU - International Journal of Electronics and Communications, May 2019, Elsevier

    Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

78. 
    Realizations of simple fractional-order capacitor emulators with electronically-tunable capacitance

    Article • Integration, May 2019, Elsevier

    Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

79. 
    Comprehensive comparison based on meta-heuristic algorithms for approximation of the fractional-order Laplacian s as a weighted sum of first-order high-pass filters

    Article • Microelectronics Journal, April 2019, Elsevier

    Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

80. 
    Third-Order Tunable-Phase Asymmetric Cross-Coupled Oscillator

    Article • IET Circuits Devices & Systems, March 2019, the Institution of Engineering and Technology (the IET)

    Prof. Ahmed S. Elwakil

81. 
    Enhancing the improved Howland circuit

    Article • International Journal of Circuit Theory and Applications, February 2019, Wiley

    Prof. Ahmed S. Elwakil

82. 
    Partial fraction expansion-based realizations of fractional-order differentiators and integrators using active filters

    Article • International Journal of Circuit Theory and Applications, February 2019, Wiley

    Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

83. 
    Parameter identification of fractional-order chaotic systems using different Meta-heuristic Optimization Algorithms

    Article • Nonlinear Dynamics, January 2019, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

84. 
    Novel two-measurements-only Cole-Cole bio-impedance parameters extraction technique

    Article • Measurement, January 2019, Elsevier

    Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

85. 
    Correlation Between the Theory of Lissajous Figures and the Generation of Pinched Hysteresis Loops in Nonlinear Circuits

    Article • IEEE Transactions on Circuits and Systems I Regular Papers, January 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

86. 
    Design and Implementation of Portable Impedance Analyzers

    Article • January 2019, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

87. 
    Short-term memory in electric double-layer capacitors

    Article • Applied Physics Letters, December 2018, American Institute of Physics

    Prof. Ahmed S. Elwakil, Dr Anis Allagui

88. 
    Single active element implementation of fractional-order differentiators and integrators

    Article • AEU - International Journal of Electronics and Communications, December 2018, Elsevier

    Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

89. 
    Chaotic Flower Pollination and Grey Wolf Algorithms for parameter extraction of bio-impedance models

    Article • Applied Soft Computing, November 2018, Elsevier

    Prof. Ahmed S. Elwakil

90. 
    Design and application examples of CMOS fractional-order differentiators and integrators

    Article • Microelectronics Journal, November 2018, Elsevier

    Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

91. 
    Rates and Effects of Local Minima on Fractional-Order Circuit Model Parameters Extracted from Supercapacitor Discharging Using Least Squares Optimization

    Article • Circuits Systems and Signal Processing, October 2018, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

92. 
    Review of fractional-order electrical characterization of supercapacitors

    Article • Journal of Power Sources, October 2018, Elsevier

    Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

93. 
    Band-Pass Filter and Relaxation Oscillator using Electric Double-Layer Capacitor

    Article • ChemElectroChem, September 2018, Wiley

    Prof. Ahmed S. Elwakil

94. 
    A voltage tunable CMOS differential active resistor and its application

    Article • International Journal of Circuit Theory and Applications, September 2018, Wiley

    Prof. Ahmed S. Elwakil

95. 
    Aluminum influence on Calotropis procera seedling growth, nutrient accumulation and electrochemical attributes

    Article • Flora, August 2018, Elsevier

    Prof. Ahmed S. Elwakil

96. 
    Hardware Optimized FPGA Implementations of High-Speed True Random Bit Generators Based on Switching-Type Chaotic Oscillators

    Article • Circuits Systems and Signal Processing, July 2018, Springer Science + Business Media

    Prof. Ahmed S. Elwakil

97. 
    Fractional-Order Multiphase Sinusoidal Oscillator Design Using Current-Mirrors

    Article • July 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

98. 
    Capacitive behavior and stored energy in supercapacitors at power line frequencies

    Article • Journal of Power Sources, June 2018, Elsevier

    Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

99. 
    True random bit generators based on current time series of contact glow discharge electrolysis

    Article • Journal of Applied Physics, May 2018, American Institute of Physics

    Prof. Ahmed S. Elwakil

100. 
     Minimization of Spread of Time-Constants and Scaling Factors in Fractional-Order Differentiator and Integrator Realizations

     Article • Circuits Systems and Signal Processing, May 2018, Springer Science + Business Media

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

101. 
     Fractional-Order Differentiators and Integrators with Reduced Circuit Complexity

     Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

102. 
     Supercapacitor Fractional-Order Model Discharging from Polynomial Time-Varying Currents

     Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

103. 
     Fractional-Order Model of a Commercial Ear Simulator

     Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

104. 
     Design and Implementation of a Bio-Impedance Analyzer Based on the Kramers-Kronig Transform

     Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

105. 
     FPGA realizations of high-speed switching-type chaotic oscillators using compact VHDL codes

     Article • Nonlinear Dynamics, March 2018, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

106. 
     Correction to: A four-quadrant current multiplier/divider cell with four transistors

     Article • Analog Integrated Circuits and Signal Processing, March 2018, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

107. 
     Simple MOS-based circuit designed to show pinched hysteresis behavior

     Article • International Journal of Circuit Theory and Applications, March 2018, Wiley

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

108. 
     A four-quadrant current multiplier/divider cell with four transistors

     Article • Analog Integrated Circuits and Signal Processing, February 2018, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

109. 
     Electronically Tunable Fully Integrated Fractional-Order Resonator

     Article • IEEE Transactions on Circuits & Systems II Express Briefs, February 2018, Institute of Electrical & Electronics Engineers (IEEE)

     Professor khaled nabil salama, Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

110. 
     Transient and Steady-State Response of a Fractional-Order Dynamic PV Model Under Different Loads

     Article • Journal of Circuits System and Computers, February 2018, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan, Professor Costas Psychalinos

111. 
     Approximation of the Fractional-Order Laplacian sα as a Weighted Sum of First-Order High-Pass Filters

     Article • IEEE Transactions on Circuits & Systems II Express Briefs, January 2018, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan, Professor Costas Psychalinos

112. 
     Fractional-Order Integrated Circuits in Control Applications and Biological Modeling

     Article • January 2018, Elsevier

     Prof. Ahmed S. Elwakil

113. 
     Contributors

     Article • January 2018, Elsevier

     Prof. Ahmed S. Elwakil

114. 
     Extraction of Phase Information from Magnitude-Only Bio-impedance Measurements Using a Modified Kramers–Kronig Transform

     Article • Circuits Systems and Signal Processing, December 2017, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

115. 
     Supercapacitor reciprocity and response to linear current and voltage ramps

     Article • Electrochimica Acta, December 2017, Elsevier

     Prof. Ahmed S. Elwakil

116. 
     Oscillator with tunable phase capability

     Article • Electronics Letters, November 2017, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

117. 
     Special issue on recent advances in the design and applications of fractional-order circuits and systems

     Article • AEU - International Journal of Electronics and Communications, November 2017, Elsevier

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

118. 
     High-Frequency Capacitorless Fractional-Order CPE and FI Emulator

     Article • Circuits Systems and Signal Processing, October 2017, Springer Science + Business Media

     Professor Costas Psychalinos, Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

119. 
     Cover Feature: Ferroelectric Fractional-Order Capacitors (ChemElectroChem 11/2017)

     Article • ChemElectroChem, October 2017, Wiley

     Prof. Ahmed S. Elwakil

120. 
     Experimental comparison of integer/fractional-order electrical models of plant

     Article • AEU - International Journal of Electronics and Communications, October 2017, Elsevier

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

121. 
     Current-mode capacitorless integrators and differentiators for implementing emulators of fractional-order elements

     Article • AEU - International Journal of Electronics and Communications, October 2017, Elsevier

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

122. 
     Experimental Verification of Fractional-Order Filters Using a Reconfigurable Fractional-Order Impedance Emulator

     Article • Journal of Circuits System and Computers, September 2017, World Scientific Pub Co Pte Lt

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

123. 
     OTA-C realization of PIλ brake and throttle controllers for autonomous vehicles

     Article • September 2017, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

124. 
     Design of a wood tissue impedance emulator in monolithic form

     Article • September 2017, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

125. 
     Modelling supercapacitors leakage behaviour using a fractional-order model

     Article • September 2017, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

126. 
     Analysis and experimental verification of a fractional-order Hartley oscillator

     Article • September 2017, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

127. 
     Ferroelectric Fractional-Order Capacitors

     Article • ChemElectroChem, August 2017, Wiley

     Professor khaled nabil salama, Prof. Ahmed S. Elwakil

128. 
     Further experimental evidence of the fractional-order energy equation in supercapacitors

     Article • AEU - International Journal of Electronics and Communications, August 2017, Elsevier

     Prof. Ahmed S. Elwakil

129. 
     Synthesis and analysis of fully differential filters using two port networks

     Article • August 2017, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

130. 
     Corrigendum: Reevaluation of Performance of Electric Double-layer Capacitors from Constant-current Charge/Discharge and Cyclic Voltammetry

     Article • Scientific Reports, June 2017, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

131. 
     Wide-range grounded non-linear transconductor and its application as a frequency doubler

     Article • International Journal of Electronics Letters, June 2017, Taylor & Francis

     Prof. Ahmed S. Elwakil

132. 
     Variability of Cole-model bioimpedance parameters using magnitude-only measurements of apples from a two-electrode configuration

     Article • International Journal of Food Properties, June 2017, Taylor & Francis

     Prof. Ahmed S. Elwakil

133. 
     All-Pass Filter Based Synthesis of Multifunctional Microwave Active Circuits

     Article • June 2017, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

134. 
     All-Solid-State Double-Layer Capacitors Using Binderless Reduced Graphene Oxide Thin Films Prepared by Bipolar Electrochemistry

     Article • ChemElectroChem, June 2017, Wiley

     Prof. Ahmed S. Elwakil

135. 
     Low-voltage commercial super-capacitor response to periodic linear-with-time current excitation: a case study

     Article • IET Circuits Devices & Systems, May 2017, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil, Dr Anis Allagui, Professor Ahmed G. Radwan

136. 
     FPGA realization of Caputo and Grünwald-Letnikov operators

     Article • May 2017, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

137. 
     Variability of supercapacitor fractional-order parameters extracted from discharging behavior using least squares optimization

     Article • May 2017, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

138. 
     The common-base differential amplifier and applications revisited

     Article • Microelectronics Journal, May 2017, Elsevier

     Prof. Ahmed S. Elwakil

139. 
     Experimental behavior evaluation of series and parallel connected constant phase elements

     Article • AEU - International Journal of Electronics and Communications, April 2017, Elsevier

     Professor khaled nabil salama, Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

140. 
     On the pinched hysteresis behavior in a state-controlled resistor

     Article • AEU - International Journal of Electronics and Communications, April 2017, Elsevier

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

141. 
     Experimental demonstration of fractional-order oscillators of orders 2.6 and 2.7

     Article • Chaos Solitons & Fractals, March 2017, Elsevier

     Professor khaled nabil salama, Prof. Ahmed S. Elwakil

142. 
     Minimal two-transistor multifunction filter design

     Article • International Journal of Circuit Theory and Applications, February 2017, Wiley

     Prof. Ahmed S. Elwakil

143. 
     Applications of Fractional-Order Circuits

     Article • January 2017, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

144. 
     Introduction

     Article • January 2017, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

145. 
     Conclusions and Motivation for Future Work

     Article • January 2017, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

146. 
     Voltage-Mode Fractional-Order Filters

     Article • January 2017, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

147. 
     Procedure for Designing Fractional-Order Filters

     Article • January 2017, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

148. 
     Current-Mode Fractional-Order Filters

     Article • January 2017, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

149. 
     Emulation of Fractional-Order Capacitors (CPEs) and Inductors (FOIs)

     Article • January 2017, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

150. 
     Design of a Portable Low-Cost Impedance Analyzer

     Article • January 2017, Scitepress

     Prof. Ahmed S. Elwakil

151. 
     CMOS Realization of All-Positive Pinched Hysteresis Loops

     Article • Complexity, January 2017, Hindawi Publishing Corporation

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

152. 
     Memristor and Inverse Memristor: Modeling, Implementation and Experiments

     Article • January 2017, Springer Science + Business Media

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

153. 
     Design of CMOS Analog Integrated Fractional-Order Circuits

     Article • January 2017, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

154. 
     DC and AC Performance of Graphite Films Supercapacitors Prepared by Contact Glow Discharge Electrolysis

     Article • Journal of The Electrochemical Society, January 2017, The Electrochemical Society

     Prof. Ahmed S. Elwakil

155. 
     Reevaluation of Performance of Electric Double-layer Capacitors from Constant-current Charge/Discharge and Cyclic Voltammetry

     Article • Scientific Reports, December 2016, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

156. 
     Analysis of a rectifier circuit realized with a fractional-order capacitor

     Article • December 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

157. 
     Improved method to determine supercapacitor metrics from highpass filter response

     Article • December 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

158. 
     Electrode location impact on cole-impedance parameters using magnitude-only measurements

     Article • October 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

159. 
     Factors impacting accurate Cole-impedance extractions from magnitude-only measurements

     Article • October 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

160. 
     Fractional-order electronically controlled generalized filters

     Article • International Journal of Circuit Theory and Applications, September 2016, Wiley

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

161. 
     Power and energy analysis of fractional-order electrical energy storage devices

     Article • Energy, September 2016, Elsevier

     Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

162. 
     Emulation of current excited fractional-order capacitors and inductors using OTA topologies

     Article • Microelectronics Journal, September 2016, Elsevier

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

163. 
     Experimental verification of on-chip CMOS fractional-order capacitor emulators

     Article • Electronics Letters, July 2016, the Institution of Engineering and Technology (the IET)

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil, Professor khaled nabil salama

164. 
     Spectral Capacitance of Series and Parallel Combinations of Supercapacitors

     Article • ChemElectroChem, July 2016, Wiley

     Prof. Ahmed S. Elwakil

165. 
     Aging effect on apples bio-impedance using AD5933

     Article • July 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

166. 
     A low frequency oscillator using a super-capacitor

     Article • AEU - International Journal of Electronics and Communications, July 2016, Elsevier

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

167. 
     Erratum: Erratum: Reduced Graphene Oxide Thin Film on Conductive Substrates by Bipolar Electrochemistry

     Article • Scientific Reports, June 2016, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

168. 
     Experimental verification of filters using fractional-order capacitor and inductor emulators

     Article • June 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

169. 
     A fractional-order dynamic PV model

     Article • June 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Costas Psychalinos, Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

170. 
     Nonlinear time-series analysis of current signal in cathodic contact glow discharge electrolysis

     Article • Journal of Applied Physics, May 2016, American Institute of Physics

     Prof. Ahmed S. Elwakil

171. 
     Switched-current fractional-order filter designs

     Article • May 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

172. 
     Determination of supercapacitor metrics using a magnitude-only method

     Article • May 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

173. 
     Guest Editorial: Fractional-Order Circuits and Systems: Theory, Design, and Applications

     Article • Circuits Systems and Signal Processing, March 2016, Springer Science + Business Media

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

174. 
     A New Second-Order All-Pass Filter in 130-nm CMOS

     Article • IEEE Transactions on Circuits & Systems II Express Briefs, March 2016, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

175. 
     Reduced Graphene Oxide Thin Film on Conductive Substrates by Bipolar Electrochemistry

     Article • Scientific Reports, February 2016, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

176. 
     Analysis and realization of a switched fractional-order-capacitor integrator

     Article • International Journal of Circuit Theory and Applications, February 2016, Wiley

     Professor Costas Psychalinos, Prof. Ahmed S. Elwakil

177. 
     Fractional-Order Two-Port Networks

     Article • Mathematical Problems in Engineering, January 2016, Hindawi Publishing Corporation

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

178. 
     Compact Wide Frequency Range Fractional-Order Models of Human Body Impedance against Contact Currents

     Article • Mathematical Problems in Engineering, January 2016, Hindawi Publishing Corporation

     Prof. Ahmed S. Elwakil

179. 
     Approximated Fractional-Order Inverse Chebyshev Lowpass Filters

     Article • Circuits Systems and Signal Processing, December 2015, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

180. 
     Series and parallel circuit models containing memristors and inverse memristors

     Article • December 2015, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

181. 
     Review of the missing mechanical element: Memdamper

     Article • December 2015, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

182. 
     Functional Units Based Model for Construction Organizations Performance

     Article • International Journal of Architecture Engineering and Construction, December 2015, International Association for Sustainable Development and Management

     Prof. Ahmed S. Elwakil

183. 
     Extracting the parameters of the single-dispersion Cole bioimpedance model using a magnitude-only method

     Article • Computers and Electronics in Agriculture, November 2015, Elsevier

     Prof. Ahmed S. Elwakil

184. 
     On a class of cross coupled fully differential filters

     Article • International Journal of Circuit Theory and Applications, October 2015, Wiley

     Prof. Ahmed S. Elwakil

185. 
     Simple non-impedance-based measuring technique for supercapacitors

     Article • Electronics Letters, October 2015, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

186. 
     Emulation of a constant phase element using operational transconductance amplifiers

     Article • Analog Integrated Circuits and Signal Processing, September 2015, Springer Science + Business Media

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

187. 
     Pinched hysteresis with inverse-memristor frequency characteristics in some nonlinear circuit elements

     Article • Microelectronics Journal, September 2015, Elsevier

     Prof. Ahmed S. Elwakil, Professor Ahmed G. Radwan

188. 
     Indirect Realization of the Imaginary Resistor jR

     Article • Circuits Systems and Signal Processing, August 2015, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

189. 
     Second order bandstop and bandpass filters using transformers

     Article • Microelectronics Journal, August 2015, Elsevier

     Prof. Ahmed S. Elwakil

190. 
     Switched-Capacitor Fractional-Step Butterworth Filter Design

     Article • Circuits Systems and Signal Processing, July 2015, Springer Science + Business Media

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

191. 
     Fractional-order models of supercapacitors, batteries and fuel cells: a survey

     Article • Materials for Renewable and Sustainable Energy, June 2015, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

192. 
     On the N-shaped Conductance and Hysteresis Behavior of Contact Glow Discharge Electrolysis

     Article • Electrochimica Acta, June 2015, Elsevier

     Prof. Ahmed S. Elwakil

193. 
     Digitally programmed fractional-order Chebyshev filters realizations using current-mirrors

     Article • May 2015, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor Costas Psychalinos

194. 
     Calculating output impedance in linear networks without source nulling or load disconnect: the instantaneous output impedance

     Article • International Journal of Circuit Theory and Applications, February 2015, Wiley

     Prof. Ahmed S. Elwakil

195. 
     Approximated Fractional Order Chebyshev Lowpass Filters

     Article • Mathematical Problems in Engineering, January 2015, Hindawi Publishing Corporation

     Prof. Ahmed S. Elwakil

196. 
     Single Transistor Active Filters: What is Possible and What is Not

     Article • IEEE Transactions on Circuits and Systems I Regular Papers, September 2014, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

197. 
     Extracting the parameters of the double-dispersion Cole bioimpedance model from magnitude response measurements

     Article • Medical & Biological Engineering & Computing, July 2014, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

198. 
     Clock-Driven Chaotic Pulse-Width Generators: An Overview and Demonstration of Power Supply Attack

     Article • International Journal of Bifurcation and Chaos, June 2014, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

199. 
     MOS-only allpass filters with extended operating frequency range

     Article • Analog Integrated Circuits and Signal Processing, May 2014, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

200. 
     Chaos-Fractals Theories and Applications

     Article • Mathematical Problems in Engineering, January 2014, Hindawi Publishing Corporation

     Prof. Ahmed S. Elwakil

201. 
     MOS-only allpass filters modified for low operating frequency range

     Article • November 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

202. 
     Cole impedance extractions from the step-response of a current excited fruit sample

     Article • Computers and Electronics in Agriculture, October 2013, Elsevier

     Prof. Ahmed S. Elwakil

203. 
     Guest Editorial Fractional-Order Circuits and Systems

     Article • IEEE Journal on Emerging and Selected Topics in Circuits and Systems, September 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

204. 
     Measurement of Supercapacitor Fractional-Order Model Parameters From Voltage-Excited Step Response

     Article • IEEE Journal on Emerging and Selected Topics in Circuits and Systems, September 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

205. 
     A Simple Model of Double-Loop Hysteresis Behavior in Memristive Elements

     Article • IEEE Transactions on Circuits & Systems II Express Briefs, August 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

206. 
     Design of fractional notch filter with asymmetric slopes and large values of notch magnitude

     Article • August 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

207. 
     Simplifying Cole-impedance extraction from the current-excited step response

     Article • August 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

208. 
     Mapping of circuit variables into two-port network variables in basic amplifier structures: identifying new topologies

     Article • International Journal of Circuit Theory and Applications, May 2013, Wiley

     Prof. Ahmed S. Elwakil

209. 
     Accurate time domain extraction of supercapacitor fractional-order model parameters

     Article • May 2013, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

210. 
     Fractional Step Analog Filter Design

     Article • January 2013, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

211. 
     Fractional Resonance-BasedRLβCαFilters

     Article • Mathematical Problems in Engineering, January 2013, Hindawi Publishing Corporation

     Prof. Ahmed S. Elwakil

212. 
     Improved Cole-Cole parameter extraction from frequency response using least squares fitting

     Article • May 2012, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

213. 
     Transient-Time Fractional-Space Trigonometry and Application

     Article • January 2012, Springer Science + Business Media

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

214. 
     High-quality factor asymmetric-slope band-pass filters: a fractional-order capacitor approach

     Article • IET Circuits Devices & Systems, January 2012, the Institution of Engineering and Technology (the IET)

     Dr Leonid Belostotski, Prof. Ahmed S. Elwakil

215. 
     Fractional-step Tow-Thomas biquad filters

     Article • Nonlinear Theory and Its Applications IEICE, January 2012, Institute of Electronics, Information and Communications Engineers (IEICE)

     Prof. Ahmed S. Elwakil

216. 
     Least squares estimation technique of Cole-Cole parameters from step response

     Article • Electronics Letters, January 2012, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

217. 
     Extracting single dispersion Cole–Cole impedance model parameters using an integrator setup

     Article • Analog Integrated Circuits and Signal Processing, August 2011, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

218. 
     The generalized exponential function and fractional trigonometric identities

     Article • August 2011, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

219. 
     Band-pass filters with high quality factors and asymmetric-slope characteristics

     Article • August 2011, Institute of Electrical & Electronics Engineers (IEEE)

     Dr Leonid Belostotski, Prof. Ahmed S. Elwakil

220. 
     Experimental technique for estimating the dispersion coefficient of a constant phase element

     Article • August 2011, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

221. 
     On the practical realization of higher-order filters with fractional stepping

     Article • Signal Processing, March 2011, Elsevier

     Prof. Ahmed S. Elwakil

222. 
     An expression for the voltage response of a current-excited fractance device based on fractional-order trigonometric identities

     Article • International Journal of Circuit Theory and Applications, February 2011, Wiley

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

223. 
     Numerical extraction of Cole-Cole impedance parameters from step response

     Article • Nonlinear Theory and Its Applications IEICE, January 2011, Institute of Electronics, Information and Communications Engineers (IEICE)

     Prof. Ahmed S. Elwakil

224. 
     All possible second-order four-impedance two-stage Colpitts oscillators

     Article • IET Circuits Devices & Systems, January 2011, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

225. 
     On the Realization of Multiphase Oscillators Using Fractional-Order Allpass Filters

     Article • Circuits Systems and Signal Processing, December 2010, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

226. 
     IMPLEMENTATION OF AN ENCRYPTED WIRELESS COMMUNICATION SYSTEM USING NESTED CHAOTIC MAPS

     Article • International Journal of Bifurcation and Chaos, December 2010, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

227. 
     On the two-port network analysis of common amplifier topologies

     Article • International Journal of Circuit Theory and Applications, November 2010, Wiley

     Prof. Ahmed S. Elwakil

228. 
     Second order approximation of the fractional laplacian operator for equal-ripple response

     Article • August 2010, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

229. 
     Ring oscillator structures with explicitly separated nonlinearity

     Article • International Journal of Circuit Theory and Applications, June 2010, Wiley

     Prof. Ahmed S. Elwakil

230. 
     HIGHER DIMENSIONAL MODELS OF CROSS-COUPLED OSCILLATORS AND APPLICATION TO DESIGN

     Article • Journal of Circuits System and Computers, June 2010, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

231. 
     A NON-CONSERVATIVE MODEL OF SECOND-ORDER RC SINUSOIDAL OSCILLATORS

     Article • Journal of Circuits System and Computers, June 2010, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

232. 
     Towards the realization of fractional step filters

     Article • May 2010, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

233. 
     Fractional-Order Circuits and Systems: An Emerging Interdisciplinary Research Area

     Article • IEEE Circuits and Systems Magazine, January 2010, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

234. 
     Extracting the Cole-Cole impedance model parameters without direct impedance measurement

     Article • Electronics Letters, January 2010, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

235. 
     All possible canonical second-order three-impedance class-A and class-B oscillators

     Article • Electronics Letters, January 2010, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

236. 
     Field programmable analogue array implementation of fractional step filters

     Article • IET Circuits Devices & Systems, January 2010, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

237. 
     Design of non-balanced cross-coupled oscillators with no matching requirements

     Article • IET Circuits Devices & Systems, January 2010, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

238. 
     On the two-port network classification of Colpitts oscillators

     Article • IET Circuits Devices & Systems, October 2009, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

239. 
     A low frequency oscillator structure

     Article • August 2009, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

240. 
     On a multivibrator that employs a fractional capacitor

     Article • Analog Integrated Circuits and Signal Processing, June 2009, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

241. 
     On the stability of linear systems with fractional-order elements

     Article • Chaos Solitons & Fractals, June 2009, Elsevier

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

242. 
     Implementation of a Chaotically Encrypted Wireless Communication System

     Article • June 2009, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

243. 
     ON THE NONLINEAR MODELING OF RING OSCILLATORS

     Article • Journal of Circuits System and Computers, June 2009, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

244. 
     Sinusoidal oscillators with lower gain requirements at higher frequencies based on an explicit tanh(x) nonlinearity

     Article • International Journal of Circuit Theory and Applications, April 2009, Wiley

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

245. 
     ON THE GENERALIZATION OF SECOND-ORDER FILTERS TO THE FRACTIONAL-ORDER DOMAIN

     Article • Journal of Circuits System and Computers, April 2009, World Scientific Pub Co Pte Lt

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

246. 
     A Study of Equilibrium Points and Stability in a Nonlinear Model of a Phase-Compensated Operational Amplifier

     Article • Circuits Systems and Signal Processing, October 2008, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

247. 
     Fractional-order sinusoidal oscillators: Design procedure and practical examples

     Article • IEEE Transactions on Circuits and Systems I Regular Papers, August 2008, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

248. 
     Monitoring of global cerebral ischemia using instantaneous phase variation plots

     Article • August 2008, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

249. 
     Nonlinear models of some ring oscillators

     Article • June 2008, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

250. 
     A SYSTEM AND CIRCUIT FOR GENERATING "MULTI-BUTTERFLIES"

     Article • International Journal of Bifurcation and Chaos, March 2008, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

251. 
     FIRST-ORDER FILTERS GENERALIZED TO THE FRACTIONAL DOMAIN

     Article • Journal of Circuits System and Computers, February 2008, World Scientific Pub Co Pte Lt

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

252. 
     Design equations for fractional-order sinusoidal oscillators: Four practical circuit examples

     Article • International Journal of Circuit Theory and Applications, January 2008, Wiley

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

253. 
     Design equations for fractional-order sinusoidal oscillators: Practical circuit examples

     Article • December 2007, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

254. 
     New squaring circuit with reduced sensitivity to element mismatches using differentially driven translinear cells

     Article • May 2007, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

255. 
     1-D DIGITALLY-CONTROLLED MULTISCROLL CHAOS GENERATOR

     Article • International Journal of Bifurcation and Chaos, January 2007, World Scientific Pub Co Pte Lt

     Professor Ahmed G. Radwan, Prof. Ahmed S. Elwakil

256. 
     Explaining Hysteresis in Electronic Circuits: Robust Simulation and Design Examples

     Article • December 2006, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

257. 
     Multiscroll Chaotic Oscillators: The Nonautonomous Approach

     Article • IEEE Transactions on Circuits and Systems II Analog and Digital Signal Processing, September 2006, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

258. 
     Explaining Hysteresis in Electronic Circuits

     Article • International Journal of Electrical Engineering Education, July 2006, SAGE Publications

     Prof. Ahmed S. Elwakil

259. 
     On the generation of higher order chaotic oscillators via passive coupling of two identical or nonidentical sinusoidal oscillators

     Article • IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications, July 2006, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

260. 
     Explaining and eliminating latchup in a classical Wien oscillator via nonlinear design

     Article • Analog Integrated Circuits and Signal Processing, May 2006, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

261. 
     Novel Approximate Square-Root Domain All-Pass Filter with Application to Multiphase Oscillators

     Article • Analog Integrated Circuits and Signal Processing, March 2006, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

262. 
     Cross-coupled chaotic oscillators and application to random bit generation

     Article • IEE Proceedings - Circuits Devices and Systems, January 2006, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

263. 
     PULSE-EXCITED RC NONAUTONOMOUS CHAOTIC OSCILLATOR STRUCTURES

     Article • International Journal of Bifurcation and Chaos, July 2005, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

264. 
     A GENERIC MODEL FOR VOLTAGE-CONTROLLED SECOND-ORDER RC SINUSOIDAL OSCILLATORS

     Article • Journal of Circuits System and Computers, April 2005, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

265. 
     On the Realization of Circuit-Independent Nonautonomous Pulse-Excited Chaotic Oscillator Circuits

     Article • IEEE Transactions on Circuits and Systems II Analog and Digital Signal Processing, October 2004, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

266. 
     Integrator-based circuit-independent chaotic oscillator structure

     Article • Chaos An Interdisciplinary Journal of Nonlinear Science, June 2004, American Institute of Physics

     Prof. Ahmed S. Elwakil

267. 
     Research-Oriented Junior/Senior Design Projects: An Analog Circuit Design Example

     Article • IEEE Transactions on Education, February 2004, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

268. 
     A FOUR-WING BUTTERFLY ATTRACTOR FROM A FULLY AUTONOMOUS SYSTEM

     Article • International Journal of Bifurcation and Chaos, October 2003, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

269. 
     Chaos in pulse-excited resonator with self feedback

     Article • Electronics Letters, January 2003, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

270. 
     AN EQUATION FOR GENERATING CHAOS AND ITS MONOLITHIC IMPLEMENTATION

     Article • International Journal of Bifurcation and Chaos, December 2002, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

271. 
     EXPERIMENTAL VERIFICATION OF THE BUTTERFLY ATTRACTOR IN A MODIFIED LORENZ SYSTEM

     Article • International Journal of Bifurcation and Chaos, July 2002, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

272. 
     Design Methodology for Autonomous Chaotic Oscillators

     Article • June 2002, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

273. 
     Nonautonomous pulse-driven chaotic oscillator based on Chua's circuit

     Article • Microelectronics Journal, May 2002, Elsevier

     Prof. Ahmed S. Elwakil

274. 
     Creation of a complex butterfly attractor using a novel Lorenz-Type system

     Article • IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications, April 2002, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

275. 
     On the necessary and sufficient conditions for latch-up in sinusoidal oscillators

     Article • International Journal of Electronics, March 2002, Taylor & Francis

     Prof. Ahmed S. Elwakil

276. 
     n-scroll chaos generator using nonlinear transconductor

     Article • Electronics Letters, January 2002, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

277. 
     Construction of classes of circuit-independent chaotic oscillators using passive-only nonlinear devices

     Article • IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications, March 2001, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

278. 
     Fractional-order Wien-bridge oscillator

     Article • Electronics Letters, January 2001, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

279. 
     GENERIC RC REALIZATIONS OF CHUA'S CIRCUIT

     Article • International Journal of Bifurcation and Chaos, August 2000, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

280. 
     A low-voltage, low-power, chaotic oscillator, derived from a relaxation oscillator

     Article • Microelectronics Journal, June 2000, Elsevier

     Prof. Ahmed S. Elwakil

281. 
     GENERIC RC REALIZATIONS OF CHUA'S CIRCUIT

     Article • May 2000, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

282. 
     Novel chaotic oscillator configuration using a diode-inductor composite

     Article • International Journal of Electronics, April 2000, Taylor & Francis

     Prof. Ahmed S. Elwakil

283. 
     A semi-systematic procedure for producing chaos from sinusoidal oscillators using diode-inductor and FET-capacitor composites

     Article • IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications, April 2000, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

284. 
     Chua's circuit decomposition: a systematic design approach for chaotic oscillators

     Article • Journal of the Franklin Institute, March 2000, Elsevier

     Prof. Ahmed S. Elwakil

285. 
     Low-voltage relaxation oscillator

     Article • Electronics Letters, January 2000, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

286. 
     Improved implementation of Chua's chaotic oscillator using current feedback op amp

     Article • IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications, January 2000, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

287. 
     Chaotic oscillator configuration using a frequency dependent negative resistor

     Article • International Journal of Circuit Theory and Applications, January 2000, Wiley

     Prof. Ahmed S. Elwakil

288. 
     Systematic realization of a class of hysteresis chaotic oscillators

     Article • International Journal of Circuit Theory and Applications, January 2000, Wiley

     Prof. Ahmed S. Elwakil

289. 
     Article • Analog Integrated Circuits and Signal Processing, January 2000, Springer Science + Business Media

     Prof. Ahmed S. Elwakil

290. 
     CMOS current feedback op amp-based chaos generators using novel active nonlinear voltage controlled resistors with odd symmetrical characteristics

     Article • International Journal of Electronics, December 1999, Taylor & Francis

     Prof. Ahmed S. Elwakil, Professor Soliman Mahmoud

291. 
     Three-phase oscillator modified for chaos

     Article • Microelectronics Journal, September 1999, Elsevier

     Prof. Ahmed S. Elwakil

292. 
     Inductorless hyperchaos generator

     Article • Microelectronics Journal, August 1999, Elsevier

     Prof. Ahmed S. Elwakil

293. 
     Mathematical Models of the Twin-T, Wien-bridgeand Family of Minimum Component Electronic ChaosGenerators with Demonstrative Recurrence Plots

     Article • Chaos Solitons & Fractals, August 1999, Elsevier

     Prof. Ahmed S. Elwakil

294. 
     CHAOTIC OSCILLATOR CONFIGURATION USING A FREQUENCY DEPENDENT NEGATIVE RESISTOR

     Article • Journal of Circuits System and Computers, June 1999, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

295. 
     A family of Colpitts-like chaotic oscillators

     Article • Journal of the Franklin Institute, May 1999, Elsevier

     Prof. Ahmed S. Elwakil

296. 
     Current conveyor chaos generators

     Article • IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications, March 1999, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

297. 
     Wien oscillators using current conveyors

     Article • Computers & Electrical Engineering, January 1999, Elsevier

     Prof. Ahmed S. Elwakil

298. 
     Two Modified for Chaos Negative Impedance Converter Op Amp Oscillators with Symmetrical and Antisymmetrical Nonlinearities

     Article • International Journal of Bifurcation and Chaos, June 1998, World Scientific Pub Co Pte Lt

     Prof. Ahmed S. Elwakil

299. 
     Two Twin-T based op amp oscillators modified for chaos

     Article • Journal of the Franklin Institute, May 1998, Elsevier

     Prof. Ahmed S. Elwakil

300. 
     Systematic realization of low-frequency oscillators using composite passive-active resistors

     Article • IEEE Transactions on Instrumentation and Measurement, April 1998, Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

301. 
     High frequency Wien-type chaotic oscillator

     Article • Electronics Letters, January 1998, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

302. 
     New chaos generators

     Article • Chaos Solitons & Fractals, December 1997, Elsevier

     Prof. Ahmed S. Elwakil

303. 
     A family of Wien-type oscillators modified for chaos

     Article • International Journal of Circuit Theory and Applications, November 1997, Wiley

     Prof. Ahmed S. Elwakil

304. 
     Chaos from a family of minimum-component oscillators

     Article • Chaos Solitons & Fractals, March 1997, Elsevier

     Prof. Ahmed S. Elwakil

305. 
     Chaos from two modified oscillator configurations using a current feedback op amp

     Article • Chaos Solitons & Fractals, March 1997, Elsevier

     Prof. Ahmed S. Elwakil

306. 
     Current mode chaos generator

     Article • Electronics Letters, January 1997, the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil

307. 
     2D scroll grid attractors from pulse-excited nonautonomous circuits

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

308. 
     Generation of n-scroll chaos using nonlinear transconductors

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

309. 
     Pulse-excited RC nonautonomous chaotic oscillator structures

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

310. 
     Nonautonomous pulse-driven chaotic oscillator based on Chua's circuit

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

311. 
     A new method for the realization of non-autonomous chaotic oscillators

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

312. 
     A system for chaos generation and its implementation in monolithic form

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil, Professor khaled nabil salama

313. 
     High frequency RC chaos generator

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

314. 
     Chaotic oscillator configuration using a frequency dependent negative resistor

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

315. 
     An Integrated Circuit Chaotic Oscillator and Its Application for High Speed Random Bit Generation

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Prof. Ahmed S. Elwakil

316. 
     Fractional-order oscillators

     Article • the Institution of Engineering and Technology (the IET)

     Prof. Ahmed S. Elwakil