高输出阻抗CMOS两级运放电路的设计与应用  

Design and Application of High Output Resistance CMOS Two-Stage Operational Amplifier Circuits

作　　者：沈鼎文 徐勇 SHEN Ding-wen;XU Yong(School of Transportation Engineering,Jiangsu Shipping College,Nantong 226010,China)

机构地区：[1]江苏航运职业技术学院交通工程学院,江苏南通226010

出　　处：《江苏航运职业技术学院学报》2024年第3期29-37,共9页Journal of Jiangsu Shipping College

基　　金：江苏航运职业技术学院科技项目(HYKY/2023B03)。

摘　　要：在集成电路中,两个输入电压信号之间存在差值,运算放大器具有放大微弱的差动信号并输出的功能,被广泛地应用于模拟信号的处理中。作为最核心的功能模块,CMOS运算放大器在城市轨道交通电路系统中发挥着重要的作用。设计了一款能实现高输出阻抗的CMOS两级运算放大电路,第一级采用差分放大电路,第二级采用共源放大电路,并实现了优化,通过仿真开环增益达到约78.2 dB,增益带宽约5.279 MHz,相位裕度约60.94°,从而提升电客车检修过程中对电源控制及通信故障处理等方面的运算速率。In integrated circuits,differences exist between two input voltage signals.Operational amplifiers have the function of amplifying weak differential signals and outputting them,and they are widely used in the processing of analog signals.As the most core functional module,CMOS operational amplifier plays an important role in urban rail transit circuit systems.A CMOS two-stage operational amplifier circuit capable of achieving high output resistance is designed,with the first stage adopting a differential amplifier circuit and the second stage adopting a common-source amplifier circuit and optimized to achieve an open-loop gain of about 78.2 dB,a gain bandwidth of about 5.279 MHz,and a phase margin of about 60.94°through simulation,to improve the computation rate of power control and communication troubleshooting in enhancing the maintenance process of electric buses.

关 键 词：运算放大器 CMOS两级运算放大电路 差分放大电路 

分 类 号：TN722.7[电子电信—电路与系统]