For AC voltage measurement, an RMS converter circuit or a precision rectifier circuit convert the AC signal into a DC voltage.
对于交流电压测量﹐利用有效值转换电路或精密整流器电路将交流信号转换成直流电压。
Simulation shows that the frequency measurement has preferable precision and voltage calculating is improved by frequency tracking.
该方法频率测量精度高,实行频率跟踪采样,提高了电压计算精。
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