Phase locked loop with a lock detector
    1.
    发明授权
    Phase locked loop with a lock detector 有权
    带锁定检测器的锁相环

    公开(公告)号:US6133769A

    公开(公告)日:2000-10-17

    申请号:US201081

    申请日:1998-11-30

    CPC分类号: H03L7/18 H03L7/0891 H03L7/095

    摘要: A phase locked loop comprises a phase locking circuit (16) which includes a phase/frequency detector (18) capable of outputting up and down signals to a charge pump (22) through separate signal paths (24, 26) and a phase lock detector (34) coupled to receive the up and down signals. The phase lock detector (34) determines the difference between the up and down signals from the phase/frequency detector (18) and in response generates a phase lock indicator signal PLL.sub.-- OUT.

    摘要翻译: 锁相环包括相位锁定电路(16),该锁相电路包括能够通过分离的信号路径(24,26)向电荷泵(22)输出上下信号的相位/频率检测器(18)和相位锁定检测器 (34),用于接收上下信号。 相位锁定检测器(34)确定来自相位/频率检测器(18)的上升和下降信号之间的差异,并且响应产生锁相指示器信号PLL-OUT。