| 摘要 |
一种相位频率侦测器模组，应用于一数位式锁相回路，包括：边缘侦测器，用以接收一参考时脉讯号以及一计数时脉讯号，其中当计数时脉讯号发生正缘时，若参考时脉讯号已发生正缘，边缘侦测器输出边缘侦测讯号，否则输出边缘未侦测讯号；计数器，耦接于边缘侦测器，其中当计数器接收到边缘侦测讯号，计数器输出一计数结果形成频率误差讯号，计数器回复初始状态，同时将一计数设定值载入计数器，而当计数器接收到边缘未侦测讯号，计数器则利用计数时脉讯号之正缘持续进行计数；频率相位转换器，用以对计数结果进行积分并形成相位误差讯号。; a counter, coupling to the edge detector, and when the counter receives the edge-detected signal, the counter outputs a counting result forming a frequency error signal, the counter resets and loads a counting default value, and when the counter receives the edge-not-detected signal, the counter keeps counting with the positive edge of the counting clock signal; a frequency-phase converter, for integrating the counting result and forming a phase error signal. |
