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本文主要是研究有关门限范围方面的二阶锁相环路,其环路滤波器选择为(1/1+тS)或(1+т_1S/1+тS),也给出一阶环路的结果。研究了环路参数、失谐误差和调制的影响。可以看出,具有滤波器(1+т_1S/1+тS)的环路可用相同的带宽和阻尼的两种方法来构成。一个环路比另一个给出较好的阴限。分析的结果被计算机模拟和用环路的硬件模拟所得的试验工作证实。
In this paper, we mainly study the second-order phase-locked loop with respect to the threshold range. The loop filter is chosen as (1/1 + тS) or (1 + т_1S / 1 + тS) . The effects of loop parameters, detuning error and modulation are studied. It can be seen that the loop with the filter (1 + т_1S / 1 + тS) can be constructed in two ways with the same bandwidth and damping. One loop gives better negative limits than the other. The results of the analysis were validated by computer simulations and experimental work done with loop hardware simulations.