基于相位重合点检测技术的测频方法的改进  

The Improvement of Frequency Measuring Technology Based on Phase Coincidence Point Detection

作　　者：薛伟[1] 王海[1] 

机构地区：[1]西安电子科技大学测控工程系,陕西西安710071

出　　处：《电子科技》2005年第7期17-20,共4页Electronic Science and Technology

摘　　要：在测频中利用检测到的相位重合点来触发测量闸门能够有效地消除传统方法中±1字的误差,大大提高了测量精度,但在实际线路中由于不能准确捕捉相位重合点,导致实际测量精度与理论精度有一定的差距,该文对此提出一些改进措施,使用闸门信号与被测信号和标频信号都同步,在一定程度上提高了测量精度。In frequency measurement, the use of the phase coincidence point to trigger the measuring gate can effectively eliminate the ±1 count error and thus greatly improve the measuring resolution. Because the phase coincidence point can not be detected precisely in the circuits, the obtained measurement resolution is lower than the theoretical resolution. This paper introduces some measures to improve the technology and increase, to some extent, the resolution.

关 键 词：相位重合点 测量精度 ECL电路 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]