Input CM variations disturb the bias pionts, alternating the small-signal gain and possibly limiting the output voltage swings. More troublesome is the variation of the diff output as a result of a change in Vin,cm, since the circuit is not fully symmetric in reality.
More Vcm,in variation and less Vos,in variation, the higher CMRR.
文章探讨了输入电压(Vin)变化如何通过CMRR(共模抑制比)影响差分电路的失调点和输出电压稳定性,特别强调了电路对称性在应对电压波动(Vcm和Vos)时的重要性。
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