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In this situation, the CMRR (common-mode rejection ratio) of the input differential amplifier was unsatisfactory.
在这种情况下，输入差分放大器的CMRR 不令人满意。
The MCU replaces the operational amplifier circuit so as to strengthen the system of common-mode rejection, improve the problems of weak signal transmission.
更换了运算放大调理电路增强了系统的共模抑制能力，改善微弱信号传输中的问题；
The main design work as follow: the former disposal circuits were designed, and the circuit possesses very high input resistance, common-mode rejection and voltage gain;
具体设计内容包括：设计具有输入阻抗大、高增益和高共模抑制比的脑电信号调理电路；
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