采用倒相方法克服比相器非线性的微机化比相仪

A Microprocessor Controled Phase Comparer Using Method of Inverting Phase to Eliminate Non Linear Errors of Phase Detector

比相法是一种高精度的频标比对方法。但在较高比相频率下，非线性误差的影响不容忽略。本文分析了线性比相器在０°（３６０°）附近比相时产生非线性误差的原因，提出了采用倒相方法克服比相器非线性的措施。

Phase comparison is a high precision comparing method for frequency standard. But the effect of non linear errors of the phase detector shouldn't be ignored for high comparing frequency. This paper analyses the reasons causing non linear error when the phase difference is close to 0° or 360°, and proposes a method of inverting phase to eliminate the non linear errors of phase detector. It is proved that the measurement accuracy of the phase detector at higher comparing frequency has been improved.