Study on closed loop frequency tracking circuit of resonant infrared sensor

被引：1

作者：

Yao, Yao ^{[1
]}

Zhang, Xia ^{[1
]}

机构：

[1] Commun Univ China, Dept Photoelect, Beijing 100024, Peoples R China

来源：

AOPC 2021: INFRARED DEVICE AND INFRARED TECHNOLOGY | 2021年 / 12061卷

关键词：

resonant sensor; phase-locked loop; frequency tracking;

D O I：

10.1117/12.2607101

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A kind of frequency tracking circuit based on phase-locked loop (PLL) is studied for the resonant infrared sensor in the paper. The operating principle of the PLL is analyzed. 74HC4046 as the core component of the circuit is selected; starting the lock circuit is researched; a closed-loop frequency tracking circuit based on 74HC4046 is built. Software simulation proves that the frequency tracking of the circuit can achieve the order of MHz and has good frequency stability and tracking performance, which lays a foundation for the construction of the follow-up resonant sensor excitation/detection circuit.

引用

页数：5