中文摘要：

利用Multisiml0．1软件对高频电路频率自动跟踪锁相环进行了仿真分析：通过改变电阻大小调整振荡波形的脉冲宽度，调整积分电路的电容大小能找出最佳锁相范围的数值大小，改变电容大小调整波形是否同步和改变信源的频率找同步范围，从而实现频率自动追踪。仿真结果与实际理论相吻合，虚拟仿真实例的结论证明了将Multisiml0．1合理引入到高频电路实验教学后，能将一些抽象、枯燥的电子线路理论教学变得具体和生动，有利于提高电子线路理论课的教学质量.

英文摘要：

Auto-frequency Tracking phase locked loop cireuit had been analyzed and simulated by Multisim 10. 1 software. By changing resislance to adjust oscillation wavefonn＇ s pulse width, and changing the integral circuit＇ s calmcilance In find optimal locked phase range, and changing capacitance to adjust wavefnrm synchronization, and changing signal soure＇ s frequenvy the authors tried to find synchronization range, thus realized frequency tracking. The simulaliml resuhs showed that simulation technology by using Muhisim 10. 1 could make some abstract and Imring theoretical teaching beeome concretely and lively, thus facilitated to improve leaching quality of the course of high frequency eleclrouic circuit.