Design of dual-stage operational amplifier with gain boosting technology
Zhu Zhi-ding · Modern Electronics Technique · 2013
Based on Chartered 0.35 μm process,a two-stage operational amplifier with gain boosting technology was de signed by using the PMOS transistor as the folded-cascode structure of the input tube.The circuit was simulated by Spectre made in Cadence.The circuit at 3.3 V has DC open-loop gain of 125.8 dB,unity-gain bandwidth of 2.43 MHz,phase margin of 61.2°,CMRR of 96.3 dB.