超低频讯号相位的测量历来是一个比较薄弱的环节,多年来一直沿用过零鉴相来获得相应的脉冲宽度,然后再填充高频脉冲,将获得的数字量经数码显示输出。根据这一原理,国内不少厂家生产了不同型号的相位计,由于过零附近讯号的畸变、鉴相器性能的差异等原 The measurement of the ultra-low frequency signal phase has always been a weak link. For many years, it has been using zero-phase detection to obtain the corresponding pulse width, and then filling the high-frequency pulse to obtain the digital output of the digital display. According to this principle, many domestic manufacturers have produced different types of phase meter, due to the distortion of the signal near zero crossing, the difference between the performance of the phase detector