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您好,看了下您的电路,有两点疑问:
1)C9在这里的作用是什么?看下两个运放的输出端是否短路了,造成两个输出端由于电压不同形成的回路大电流,从而导致功耗增大。
2)滤波器的架构是MFB filter吗?如果是MFB架构,两个反馈电容接在R41和R42前面是对的,但是反馈电阻R43和R44应该接在R41和R42的外面。
MFB filter的架构如下: