电荷泵锁相环的z域建模  

Charge-pump phase-lock loop′s z-domain modeling

作　　者：宋佳颖[1] 

机构地区：[1]武汉科技大学,湖北武汉430081

出　　处：《现代电子技术》2012年第24期145-148,152,共5页Modern Electronics Technique

摘　　要：为了对电荷泵锁相环进行更好的模拟及研究,采用采样保持器对进行电路了模拟,得出了一个新型的电荷泵锁相环z域模型。着重介绍了z域模型的推导方法。同时,给出了该模型的Matlab仿真结果,分析了其稳定性,与其他模型进行对比,得出的z域模型相比于之前的模型更容易计算与理解,也方便研究环路稳定性。With the rapid development of communication industry, the charge-pump phase-lock loop （CP-PLL） was popu-larized gradually. In this paper, according to the properties of CP-PLL circuit, the sample hold device was adopted to imitate the behavior of the circuit. A new CP-PLL z-domain model was obtained. The calculation method of the model is introduced emphatically. The Matlab simulation result of this model is given. The model stability is analized. It is compared with other models. The result shows that the z-domain model is easier to calculate and uderstand, and more convenient to analize the sta-bility of CP-PLL than those of the original models.

关 键 词：电荷泵锁相环 建模 MATLAB z域模型 

分 类 号：TN79-34[电子电信—电路与系统]