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高输出阻抗CMOS两级运放电路的设计与应用

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

operational amplifierCMOS two-stage operational amplifier circuitdifferential amplifier circuit

沈鼎文、徐勇

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江苏航运职业技术学院 交通工程学院,江苏 南通 226010

运算放大器 CMOS两级运算放大电路 差分放大电路

2024

江苏航运职业技术学院学报
南通航运职业技术学院

江苏航运职业技术学院学报

影响因子:0.289
ISSN:2097-0358
年,卷(期):2024.23(3)