An Integrator Circuit Using Voltage Difference Transconductance Amplifier

What is it about?

This paper illustrates a novel design of voltage-mode Integrator using the active element, namely Voltage Difference Transconductance Amplifier (VDTA). The proposed circuit avails one VDTA element and a single capacitor. This provides more beneficial for the fabrication of ICs in VLSI design. The designed circuit works with ±0.9 V supply voltage, uses a bias current of order 150 µA and also its amplitude is electronically tunable with the bias current. The proposed circuit is designed in a gpdk 180 nm CMOS process using a Cadence Virtuoso tool and also has the power dissipation of order 270 µW. The simulation results are verified experimentally with the commercially available ICs LM13700.

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Why is it important?

A new voltage-mode Integrator circuit availing one VDTA is proposed. The devised Integrator circuit presented in this paper uses only one single capacitor without the use of resistor. This gives the advantage for easy implementation and manufacturing of IC's in VLSI design. The designed circuit is simulated in a Cadence Virtuoso tool of 180 nm CMOS technology and works with a supply voltage of ± 0.9 V. The circuit has wider applications such as waveform generators, control systems, microwave communication systems and instrumentation Systems.