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TINA TI仿真奇怪问题



两个仿真图CMRRAA和CMRRBB,直流分析结果完全不同,线路完全一样。

只要把CMRRAA的U2删除重新放上去就和CMRRBB结果一样了。非常奇怪,有人知道为什么吗?

 CMRRAABB.rar

仿真图在附件里,大侠帮忙下,谢谢