High-precision phase difference measurement method and circuit

The invention, which belongs to the technical field of electronic measurement, in particular relates to a high-precision phase difference measurement method and circuit. A high-speed comparator is used for carrying out shaping on two paths of signals; a high-frequency integrated phase discrimination and frequency discrimination device carries out phase comparison to obtain a phase difference pulse; after level conversion, DSP qualitative determination, initial measurement and error correction are carried out to obtain accurate phase difference parameters of the two paths of signals and then the parameters are displayed. With comprehensive utilization of the high-speed phase-discrimination technology and the DSP's fast calculation and processing, accurate measurement of the phase differenceparameters between the two paths of same-frequency input signals in the wide frequency range is realized. 本发明属于电子测量技术领域，具体涉及种高精度相位差测量方法及电路。本发明利用高速比较器对两路信号整形，由高频集成鉴相鉴频器比相得到相位差脉冲，经过电平转换后，由DSP定性判断、初测及误差校正，得到两路信号的准确相位差参数送去显示。综合利