Abstract
An operational transconductance amplifier (OTA) is a voltage controlled current source. In analog circuits and systems that earlier uses operational amplifiers to implement operational transconductance. The modern world is focused on the advancement of VLSI technology, and everything is connected to transistor size and a circuit's reducing power supply. Operational transconductance amplifiers are frequently employed in analog circuits, such as filtering, converters, and instrument amplifiers. The comparative study of OTAs is presented in this paper. Both SI-OTA and MI-OTA are implemented using <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$0.18-\mu m$</tex> CMOS technology from Taiwan Semiconductor Manufacturing Company (TSMC). Simulation results illustrate that the MIOTAs are having better performance in terms of power and delay.
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