C+=DC220V,C-=0V,目的是实现测量C+电源，现在有个问题，当C+=0V时，上电之后C+电压开始上升，储能电压始终处于0V，在输入端用镊子搭一下就正常了（1200的2脚和C+都可以），是不是我的电路设计有问题，求解
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