An Improved Method About Analysis and Simulation of Nonlinear PLL

Based on the simulation of linear PLL,this paper puts forward an improved method to analyze and simulate the nonlinear performance of PLL.Some PC-based circuit CAD programs (such as IsSpice,Pspice,etc.)can be used to model the nonlinear PLL,as a illustration,one instance with sine PD and step frequency hopping is simulated with this method,from it we can watch the locking process of a PLL circuit which is impossible for a linear PLL model analyses,further more,a magic phenomenon can be found to determine whether it will lock out.