低压低功耗全摆幅CMOS运算放大器设计与仿真pdf,ABSTRACT In recent years, more and more electronic products with battery supply are widely used, which cries for adopting low voltage analog circuits to reduce power consumption, therefore low voltage, low power analog circu

基于70 V高压双极型工艺，设计了一种适用于单片高压功率运算放大器的输入级电路。该电路采用p沟道结型场效应晶体管(JFET)组成的差分对套筒式共源共栅(differential telescopic cascode)结构，具有低偏置电流、低失调电压、低失调电流、高共模抑制比的特点。以共集-共射（CC-CE）的放大电路结构作为该输入级电路的负载，减小对输入级影响的同时能够提高电压增益。Spectre仿真结果表明，输入偏置电流仅为20 pA，失调电压为0.11 mV，失调电流为0.57 fA，连接负