发明授权
US06710636B1 Method and system for high resolution delay lock loop 失效
高分辨率延迟锁定环的方法和系统

Method and system for high resolution delay lock loop
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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