Optimal designs of nulling resistor compensation and a robust bias‐based op‐amp circuit using an evolutionary approach

Abstract

This article suggests an evolutionary optimisation method namely symbiotic organisms search (SOS) algorithm-based area optimised designs of a nulling resistor compensation circuit and a robust bias-based complementary metal oxide semiconductor (CMOS) analogue operational amplifier (op-amp) circuit. SPICE simulator is used to validate the results obtained by using the optimisation technique SOS. The results obtained by SPICE simulation confirm that all the design specifications are accurately satisfied for both the circuits considered here. The results also prove that the SOS algorithm is superior to the formerly reported methods in terms of the gain, power dissipation, area etc., for both the individual circuits. Design steps for nulling resistor compensationbased op-amp circuit The op-amp is considered as the fundamental circuit used in analogue IC design. Uses of two-stage op-amps are found in many