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OP37做交流信号跟随出来有杂波

Other Parts Discussed in Thread: OP07

再做一个自动增益,核心运放是AD603

为了满足它的输入范围,在前级对输入的信号进行衰减处理后接入OP37做电压跟随

信号幅值范围为5mV到5V,频率范围100HZ到1MHZ

考虑到带宽问题故选用了OP37,对分压衰减为输入信号1/5的信号进行跟随稳定

但出来的波形总会有400mv的纹波

就像这样

我已经排除了其他干扰,但是这个信号就是这样的,如何在不更换芯片的情况下解决这个问题