发明授权
- 专利标题: Method and system for high resolution delay lock loop
- 专利标题(中): 高分辨率延迟锁定环的方法和系统
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申请号: US10264692申请日: 2002-10-03
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公开(公告)号: US06710636B1公开(公告)日: 2004-03-23
- 发明人: Gary Gibbs , Lingsong Xu , Sanjay Sancheti
- 申请人: Gary Gibbs , Lingsong Xu , Sanjay Sancheti
- 主分类号: H03L706
- IPC分类号: H03L706
摘要:
A method for utilizing a delay lock loop to cover a wide delay range. In one method embodiment, the present invention receives a reference clock pulse. Next, in a first loop, a phase variation is adjusted between the feedback clock pulse and the reference clock pulse utilizing a coarse delay in conjunction with a first fine delay. The resulting pulse is then output to a chip delay and then sent back to the delay lock loop as a feedback clock pulse. Additionally, in a second loop, the phase variation is adjusted between said second loop and said first loop utilizing the coarse delay in conjunction with a second fine delay, wherein the second fine delay has a delay range for adjusting the phase variation which overlaps the delay range of the first fine delay of the first loop.
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