高精度频标比对实现的新方法

A New Method for High Precision of Frequency Standards Comparison

提出了一种实现高精度频标比对的新方法,通过控制正反相切换电路来达到消除鉴相中的“死区”和非线性问题,通过对两个比对信号经过鉴相器输出的矩形脉冲进行填充,并对填充脉冲在给定时间内进行计数可以将计数值进行曲线拟合,得到高精度的相位比对曲线并计算出两比对信号的频差。

Presents a new method to achieve high precision of frequency standards comparison. Positive - negative phase switch circuit is used to eliminate the ＂dead - region＂ and nonlinear problems in phase - detecting instrument. By filling the rectangle pulses which are produced by the phase- detecting instrument and counts them in given time. High precision phase comparison curve can be observed by using calculated values to simulate curve and the variation between the two compared frequencies can be calculated at the same time.