电荷泵锁相环的事件驱动建模与仿真

Event-Driven Modeling and Simulation of a CP-PLL

提出采用Matlab实现电荷泵锁相环的事件驱动建模与仿真的方法,改变了传统方法按固定步长对时间进行扫描的方式,它只计算特定的时间点,因此能够快速并准确的仿真。以三阶环路为例,首次推导环路的相位递归方程,并对频率固定信号和频率阶跃变化的信号分别进行锁定时间仿真,验证了仿真的正确性。

An event- driven modeling and simulation technique for CP - PLL,implemented in Matlab is presented in this paper. It is different from the traditional method, which scans the time in fixed step. It enables rapid and accurate simulation as it only calculates the time instants of interest. The phase recursive equation of loop on the triple- order loop for the first time has gained,and simulation is made on locked time with respect to the signals of both constant frequency and stepped frequency. Furthermore,the correctness of the simulation is tested by experiment.