Frequency compensation technique for low voltage three stage operational amplifier

Abstract

This thesis presents a new frequency compensation technique for low supply voltage three-stage operational amplifier at higher loads. It is based on the miller splitting and pole-zero cancellation using feed-forward path. To reduce the value of compensation capacitance feedback stage is added in series with the compensation capacitance. The amplifier exhibits a dc gain 72db,a gain bandwidth of 35MHz at 63 degree phase margin slew rate 1 v/sμ, a compensation capacitance 4.5pF and load capacitance 300pF while consuming 395Wμat a 1-V supply voltage.