摘要
针对双端输入的有源环路滤波器,对其设计方法进行了论述。在理论分析的基础上,得到跳频系统最优的有源环路滤波器阶数,并结合鉴相器、运算放大器等非理想因素的影响,给出工程上实用的滤波器结构。简单介绍了如何选择运放芯片,理论分析了单位增益带宽、压摆率和等效输入噪声电压等运放参数,对锁相环系统的稳定性、跳频时间和相位噪声等指标的影响,给出的实验测试结果与理论分析一致。
In this paper,the design method of active loop filter is discussed by taking a double-input active loop filter as an example.The optimal orders of active loop filter are obtained on the basis of theoretical computation.Then the engineering structure of the filter is designed considering the non-ideal factors from the phase discriminator,operational amplifier and so on.The selection of op-amp chips is introduced briefly and the influences of the operational amplifier ＇s parameters（ unity-gain bandwidth,equivalent input noise voltage,etc.） on the phase-locked loop system are theoretically analyzed. The experiment results are consistent with the conclusions above.
作者
潘阳卉
程龙宝
杨振
PAN Yanghui;CHENG Longbao;YANG Zhen(Shanghai Aerospace Electronic Technology Institute,Shanghai 201109,China)
出处
《无线电工程》
2018年第7期606-609,共4页
Radio Engineering
