本文讨论在使用过零检测器提取位信息的情况下,数字锁相环的性能同输入信噪比及输入带宽的关系,给出此关系曲线供设计电路时参考,指出这种电路的应用条件,并将此电路和较复杂的电路在性能上做简单的比较。 This paper discusses the use of zero-crossing detector to extract bit information, the performance of the digital phase-locked loop with the input signal-to-noise ratio and the input bandwidth, given the relationship curve for the design of the circuit reference points out the application of this circuit conditions , And this circuit and more complex circuit in the performance of a simple comparison.