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请问LOG104如何坚持信噪比

Other Parts Discussed in Thread: TINA-TI

我设计了这样的一个电路来检测两路的微小的光电流信号,老师问我的这个模块的信噪比是多少?我不知道如何检测。输入的是两路恒定的光电流信号。

电路图是这样的:

希望工程师指点一下,谢谢!