Design Implementation and Frequency Analysis of Two stage and three stage Operational Amplifiers using C5 process for CMOS

This paper discusses design methodologies and frequency analysis of two stage and three stage i.e. multistage CMOS operational amplifiers and analyse the effect of various parameters on the characteristics of operational amplifiers using submicron CMOS spice models specifically 300 nm C5 process CMOS technology. In this paper response curves are plotted for AC characteristics of 4 different topologies of 2 stage operational amplifiers are tabulated for suitable frequency ranges. Transients are also plotted from nanoseconds scale to microseconds scale. Subsequently FFTs are also tabulated at frequency range from 1 MHz to 25 GHz. By results and reasons it shows that two stage and three stage topologies are suitable choices for low voltage and high performance applications.