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低频信号相位差的精密测量史延龄相位差是电子学、电工学中的重要参数。目前，一些资料中所介绍的测量相位差的方法，大多是针对一固定频率（多为工频），先测时间差，再计算相位差。即使时间差测量精确，但因未考虑频率变化，精度并不高。本文介绍的测量方法，具有硬件电...
Precision measurement of phase difference of low frequency signal Shi Yanling Phase difference is an important parameter in electronics and electrotechnics. At present, some methods described in the data to measure the phase difference, mostly for a fixed frequency (mostly for the frequency), first test the time difference, and then calculate the phase difference. Even if the time difference measurement accuracy, but did not consider the frequency change, the accuracy is not high. This article describes the measurement method, with hardware ...