基于多级变频的低相位噪声宽频带锁相环设计  

Design of Phase-Locked Loop with Low Phase Noise and Broadband Phase Based on Multi-stage Frequency Conversion

作　　者：李宁 杨东营 王伟 刘公政 LI Ning;YANG Dongying;WANG Wei;LIU Gongzheng(Ceyear Technologies Co.,Ltd.,Qingdao 266555,China)

机构地区：[1]中电科思仪科技股份有限公司,山东青岛266555

出　　处：《电声技术》2024年第8期96-98,104,共4页Audio Engineering

基　　金：中国电子科技集团有限公司创新基金项目(KJ2202008)。

摘　　要：为提高锁相环输出信号的相位噪声性能,设计一种具有低相位噪声特性的宽频带锁相环。该锁相环以500 MHz和4.8 GHz的梳状波信号作为输入信号,经过多级变频和滤波后进行锁相。测试结果表明,该设计具有易于实现、易于调试、可靠性高等特点,在10 kHz频偏处的相位噪声均优于-129 dBc·Hz^(-1),满足设计要求。To improve the phase noise performance of the output signal of the phase-locked loop,a wideband phase-locked loop with low phase noise characteristics is designed.This phase-locked loop uses comb wave signals of 500 MHz and 4.8 GHz as input signals,which are subjected to multi-stage frequency conversion and filtering before being phase-locked.The test results show that the design has the characteristics of easy implementation,easy debugging,and high reliability.The phase noise at the 10 kHz frequency offset is better than-129 dBc·Hz^(-1),which meets the design requirements.

关 键 词：多级变频 相位噪声 锁相环 宽频带 

分 类 号：TN912.2[电子电信—通信与信息系统]