Sizing of two stage Op-Amp using OHS algorithm

An optimally designed CMOS Op-Amp has been presented in this article. Opposition concept based harmony Search (OHS) algorithm is applied for obtaining the minimum MOS area of the proposed Op-Amp. The proposed OHS based analog CMOS Op-Amp circuit design has alleviated from the problems of suboptimal convergence and stagnation, unlike Particle Swarm Optimization (PSO) and Harmony Search (HS). The least total MOS area of 121.8 μm
²
is obtained in 0.35 μm CMOS technology with a power dissipation of 616.3 μW.