一个 DPTD 频率标准比对系统。

A DPTD frequency standard comparison system.

机构信息

Department of Measurement and Instrumentation, Xidian University, Xi’an, China.

出版信息

IEEE Trans Ultrason Ferroelectr Freq Control. 2012 Nov;59(11):2386-9. doi: 10.1109/TUFFC.2012.2471.

DOI:10.1109/TUFFC.2012.2471

PMID:23192802

Abstract

A dual phase-coincidence-detection time difference (DPTD) system for frequency standard comparison is proposed in this paper. Based on the concept of the greatest common factor frequency and a high-stability common frequency source, a high-resolution phase comparison between frequency standards can be implemented by utilizing the phase coincidence detection approach. The resolution of this simple instrument is better than 10 ps and the resolution of theoretical analysis is much higher than 10 ps. Compared with dualmixer time difference systems, a comparison system based on this method is simple in structure and low in cost.

摘要

本文提出了一种用于频率标准比对的双相位符合探测时间差（DPTD）系统。基于最大公因数频率的概念和高稳定公共频率源，利用相位符合探测方法可以实现频率标准之间的高分辨率相位比较。该简单仪器的分辨率优于 10 ps，理论分析的分辨率远高于 10 ps。与双混频时差系统相比，基于该方法的比较系统结构简单，成本低。