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一、引言锁相环方块图示于图1,分析时用的等效图示于图2。锁相环在一定输入频率(f_1)下的所有零点(稳定锁住时的VCO频率)均用图1确定。
I. Introduction Phase-locked loop block diagram shown in Figure 1, the equivalent analysis used in Figure 2. All of the zero points of the PLL at a certain input frequency (f_1) (VCO frequency at steady lock) are determined using Figure 1.