有源二阶锁相环路滤波器设计  

Design of Second-Order Active PLL Filter

作　　者：李泽鹏[1] 高玉良[2] 张路[2] 王运泽 

机构地区：[1]空军雷达学院研究生管理大队,武汉430019 [2]空军雷达学院五系,武汉430019 [3]总装驻南京大桥机器厂军代室,南京210031

出　　处：《空军雷达学院学报》2011年第3期192-195,共4页Journal of Air Force Radar Academy

摘　　要：为了改善锁相环频率合成器的性能,对有源二阶锁相环路滤波器的设计方法进行了总结与归纳.根据环路滤波器传递函数和单环锁相系统传输函数,通过工程算法计算环路滤波器各个参数,分析了不同环路带宽和杂散因素等对环路滤波器设计的影响.以单环锁相环为例,对有源二阶锁相环路滤波器进行了设计,运用ADS软件进行仿真,对结果加以对比分析,证明该环路滤波器能使锁相环频率合成器满足低杂散、低相噪、快速锁定的性能要求.To improve the performance of the PLL frequency synthesizer,this paper sums up the design method of second order active PLL filter.According to the transfer function of the loop filter and the phase locked system with single loop,the impact of various loop bandwidths and other stray factors on the design of loop filter is analyzed,by using the engineering algorithm to compute those various parameters in the loop filter.By taking an example of the PLL with single loop,the 2nd order active PLL filter is designed,the simulation is performed via the ADS software and the results are analyzed comparatively.It is shown that the PLL frequency synthesizer using the designed loop filter can meet the performance requirements for low spur level,low phase noise and fast lock.

关 键 词：锁相环 有源环路滤波器 相位噪声 

分 类 号：TN74[电子电信—电路与系统]