如何仿真SIGMA-DELTA ADC的CMRR？

自己顶一下

请问lz的问题已经解决了吗?我也正有此问，谢谢啦

1. apply common-mode positive input and negative input with the same sine wave( for example 1mv 1khz)
and calculate modulator or converter digital output FFT 1khz power
2. apply a differential input at input nodes sine wave( for example 1mv 1khz) and calculate modulator or converter digital output FFT 1khz power
the CMRR is Power2 / Power1

thx hugodarwin
and what about psrr?how to simulate it?

1. apply dc to input node and applydc-rail input with sine wave( for example 100mv 1khz)
to vdd node and calculate modulator or converter digital output FFT 1khz power
2. apply a differential input at input nodes sine wave( for example 100mv 1khz) and calculate modulator or converter digital output FFT 1khz power
the PSRR is Power2 / Power1

thx for reply castrader~！

不仿真mc，有失配吗?仿出来也没意义。

是啊，没有失配cmrr、psrr会暴高的?要怎么才能去逼近真实情况呢?