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【简答题】
差动放大器电路所用的 IC 器件的共模抑制比 CMRR D =100dB ,放大电路闭环差动增益 Ad=20 ,电阻误差 δ=±0.1% ,求放大器的总共模抑制比()dB。当 Ad=1 时,放大器的总共模抑制比又是多少()dB?
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