| 锁相环中无源环路滤波器的设计与仿真 |
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| 引用本文： | 刘丽平,杨维明,李倩,陆曲.锁相环中无源环路滤波器的设计与仿真[J].湖北大学学报(自然科学版),2011,33(4):494-497. |
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| 作者姓名： | 刘丽平 杨维明 李倩 陆曲 |
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| 作者单位： | 湖北大学物理学与电子技术学院,湖北武汉,430062 |
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| 摘 要： | 锁相环(PLL)的基本频率特性主要是由环路滤波器决定的.为了节省锁相环的设计仿真时间,提高设计效率,提出一种基于ADS仿真平台的环路滤波器系统级设计与仿真方法.分析RC无源滤波器截止频率与锁相速度之间的关系；引入滞后超前滤波器结构,提高PLL的稳定性,还分析滞后超前滤波器的幅度-频率特性,以及影响相位返回量的因素,并基...
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| 关 键 词： | 锁相环 无源滤波器 设计 仿真 锁相速度 |
The design and simulation of passive loop filter in phase-locked loops |
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| LIU Liping
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YANG Weiming
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LI Qian
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LU Qu.The design and simulation of passive loop filter in phase-locked loops[J].Journal of Hubei University(Natural Science Edition),2011,33(4):494-497. |
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| Authors: | LIU Liping YANG Weiming LI Qian LU Qu |
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| Institution: | (School of Physics and Electronic Technology,Hubei University,Wuhan 430062,China) |
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| Abstract: | the basic performance of phase locked loop（PLL） was mainly determined by the loop filter.In order to save the simulation time and improve the design efficiency,a kind of system-level design and hybrid simulation way was applied to loop filter design based on ADS software platform.The relationship between cut-off frequency and the phase-locking speed of RC delay filter was analyzed.In order to improve the stability of PLL,the lag-lead filter structure was introduced.Furthermore,the amplitude-frequency characteristics and factors of affecting the phase margin were analyzed in the lag-lead filter.Finally,the relationship between the phase margin and the Phase-locked speed was worked out based on ADS software,which provided theory references for loop filter design. |
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| Keywords: | PLL passive filter design simulation loop locked speed |
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