对一个1~60mv直流电压信号放大100倍,放大倍数不稳定,当信号在0~1mv之间时放大倍数就在90~100倍的样子,但是超过1mv时放大倍数就乱跳了,有时候300,有时500,记得有次输入6mv时输出就到3v多了,请问这是怎么回事?电路就是参考电路,双电源供电
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对一个1~60mv直流电压信号放大100倍,放大倍数不稳定,当信号在0~1mv之间时放大倍数就在90~100倍的样子,但是超过1mv时放大倍数就乱跳了,有时候300,有时500,记得有次输入6mv时输出就到3v多了,请问这是怎么回事?电路就是参考电路,双电源供电