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msp 430fe 425单相电度表采样问题

Other Parts Discussed in Thread: MSP430FE425

使用msp430fe425这款芯片做单相电度遇到这样一个问题 :没有接入采样电路的时候 有电流电压值 ,接入采样电路后,有电压值,但是电流值为零,当电流值产生变化的一瞬间,可以采到电流值。

硬件电路采用两路电流互感器做电流采样,一路电压互感器。