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由电源纹波引起的运放输出电压波动需要乘以放大器的增益倍数吗?
Hi,
运放的PSRR定义如下图。电源电压纹波会造成运放失调电压的波动,然后按照失调电压对电路的影响进行计算。在同向比例放大电路中,失调电压需要乘以放大倍数得到输出电压波动;在反向比例放大电路中,需要乘以放大倍数绝对值+1 得到输出电压中的波动。