高阶锁相环非线性性能及其改善

Nonlinear Function of Higher-order PLL and Its Improvement

用数值计算方法研究三阶锁相环的非线性性能及其改善途径.建立具有正弦鉴相特性的三阶锁相环的动态非线性微分方程,通过编制数值解程序,求出不同条件下的相轨迹和时间响应图,分析了电路参数和初始条件对三阶锁相环非线性性能的影响,并提出改善非线性性能的途径.

This paper deals with a research on the nonlinear function of the three-order PLL, and its improvement by the numerical methods. The active nonlinear differential equations of the three-order PLL with the characteristic of the sine phase comparison were established and the program of numerical solution to the equations was worked out. Phase trajectories and time-response diagrams in various conditions were got. Influence on its nonlinear function put by electric circuit parameters and initial condition were analyzed and the ways to improve nonlinear function on it was found out.