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一、引言近年来,通过振荡器输出电压间的比相实现两个或若干振荡器的同步,应用日益广泛。如在电视技术中对帧、行及色彩副载波的同步;在航天技术中对受到强干扰之信号的接收;在通信技术中任一闭合脉码调制网路的同步以及在测量技术中用于制造跟踪滤波器、选频电子管电压表和十进主控振荡器等。跟踪同步环路目前通称为锁相环,其基本组成见图1所示。鉴相器PD根据两相邻高频信号的相位差φ=φ_1-φ_2产生一控制电
I. INTRODUCTION In recent years, the synchronization between two or more oscillators has been applied by the phase ratio of the oscillator’s output voltage. Such as the synchronization of frames, lines and color subcarriers in television technology; the reception of strongly disturbed signals in aerospace technology; the synchronization of any closed-loop pulse code modulation network in communications technology and the use in measurement techniques for Manufacturing tracking filters, frequency tube vials and ten master oscillator. Tracking synchronization loop is now commonly known as phase-locked loop, the basic components shown in Figure 1. The phase detector PD generates a control voltage according to the phase difference φ = φ_1-φ_2 of two adjacent high-frequency signals