发明授权
US07620126B2 Method and apparatus for detecting frequency lock in a system including a frequency synthesizer
失效
用于检测包括频率合成器的系统中的频率锁定的方法和装置
- 专利标题: Method and apparatus for detecting frequency lock in a system including a frequency synthesizer
- 专利标题(中): 用于检测包括频率合成器的系统中的频率锁定的方法和装置
-
申请号: US11236658申请日: 2005-09-27
-
公开(公告)号: US07620126B2公开(公告)日: 2009-11-17
- 发明人: David William Boerstler , Matthew E. Fernsler , Eskinder Hailu , Jieming Qi , Mack Wayne Riley
- 申请人: David William Boerstler , Matthew E. Fernsler , Eskinder Hailu , Jieming Qi , Mack Wayne Riley
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 代理商 Matt Talpis; Mark P Kahler
- 主分类号: H03D3/18
- IPC分类号: H03D3/18
摘要:
A frequency synthesizer lock detection system is disclosed that distributes a frequency synthesizer output signal across a distribution network to one or more receptor circuits. The distribution network may exhibit delay and other distortion that may cause the downstream signal arriving at the receptor circuit to lose frequency lock with both the frequency synthesizer output signal and a reference clock signal that controls the frequency of the synthesizer output signal. The lock detection system tests the downstream signal to determine if the downstream signal exhibits a lock with respect to the reference clock that determines the operating frequency of the frequency synthesizer. In this manner, lock of the downstream signal to the reference clock signal may be accurately assessed in one embodiment.