计量学报Issue(4)：432-435,4.DOI:10.3969/j.issn.1000-1158.2015.04.21
基于锁相环的解调技术研究
Demodulation Technology Based on Phase-locked Loop
罗莹 1张志伟 2杨宁3
作者信息
- 1. 中北大学信息与通信工程学院，山西 太原 030051
- 2. 浙江省通信产业服务有限公司咨询设计院，浙江 杭州 310000
- 3. 中北大学电子测试技术重点实验室，山西 太原 030051
- 折叠
摘要
Abstract
The fundamentals of the PLL phase-modulated signal demodulation technique is described,and the integrated PLL NE564 is used to achieve lock demodulated for the signal. In order to demodulate the undistorted waveforms,the PM demodulation system using the integrated PLL NE564 and LM725CN chip is designed. The system can achieve the function of signal modulation demodulation directly and advantage of the characteristics of phase to the stability of the track to avoid the defect of the frequency lock loss,and improve the measurement accuracy. The system is simple, strong stability advantages,and has a strong practicability for heterodyne laser interferometer demodulation signal.关键词
计量学/锁相环/NE564/调制解调/激光外差干涉Key words
Metrology/Phase-locked loop/NE564/Modem/Heterodyne laser interferometer分类
通用工业技术引用本文复制引用
罗莹,张志伟,杨宁..基于锁相环的解调技术研究[J].计量学报,2015,(4):432-435,4.
