- 专利标题: Phase detector offset to resolve CDR false lock
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申请号: US16918854申请日: 2020-07-01
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公开(公告)号: US10985764B1公开(公告)日: 2021-04-20
- 发明人: Winson Lin , Jin Namkoong , Hongtao Zhang
- 申请人: XILINX, INC.
- 申请人地址: US CA San Jose
- 专利权人: XILINX, INC.
- 当前专利权人: XILINX, INC.
- 当前专利权人地址: US CA San Jose
- 代理机构: Patterson + Sheridan, LLP
- 主分类号: H04L7/00
- IPC分类号: H04L7/00 ; H04L7/033 ; H04L25/03 ; H03L7/087 ; H03L7/08
摘要:
An example method of clock and data recovery (CDR) includes adding a pre-defined offset to an output of a phase detector (PD) of a CDR circuit, and loading an accumulator of a frequency loop of the CDR circuit with a pre-defined load value. The method further includes detecting the phase of an incoming signal using a PD, and determining that the CDR has locked onto a real lock point. In some examples, the method further includes determining that the CDR has locked on a real lock point, and, in response to the determination, modifying the pre-defined offset to equal zero.
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