-
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。