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差分信号如何与运放共地
是的,这是一个一般运放的内部输入部分,不理解差分信号是如何流过运放的,即信号如何从U1经过运放内部流回到U2
差分放大电路是基于电路的对称性而工作的,放大的是差模信号,抑制共模信号。
工作原理一般模拟电子类的书籍都有讲,下面我之前下载的《模拟电子技术基础》也有讲,可以查阅:
《模拟电子技术基础》.pdf