Clock signal reproduction device and clock signal...

Details Clock signal reproduction device and clock signal... Clock signal reproduction device and clock signal...

2006-11-30

2010-06-08

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C327S156000, C375S316000

Reexamination Certificate

active

07733987

ABSTRACT:
A phase comparator detects time lag or time lead of the phase of a data signal with respect to a reproduced clock signal from a first digital VCO. A random walk filter measures a difference between number of lags and number of leads, controls the first digital VCO to shift the phase of the reproduced clock signal in a direction to cancel the difference when the absolute value of the difference reaches a predetermined value, and resets the measurement result to restart the measurement. A phase comparator detects the phase difference between reproduced clock signals from the first digital VCO and a second digital VCO and notifies it to the random walk filter. While the amount of the notified phase difference is being a predetermined amount, the random walk filter neither resets the measurement result nor shifts the phase of the reproduced clock signal from the first digital VCO.

REFERENCES:
patent: 4639682 (1987-01-01), Takeuchi
patent: 5579184 (1996-11-01), Nakanishi et al.
patent: 5950115 (1999-09-01), Momtaz et al.
patent: 6104222 (2000-08-01), Embree
patent: 6900676 (2005-05-01), Tamura
patent: 7469026 (2008-12-01), Nguyen et al.
patent: 2002/0175722 (2002-11-01), Mano et al.
patent: 58-095447 (1983-06-01), None
patent: 09-275396 (1997-10-01), None
patent: 2003-258783 (2003-09-01), None

Affiliated with

Also associated with

Rating

Clock signal reproduction device and clock signal... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Clock signal reproduction device and clock signal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clock signal reproduction device and clock signal... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4242076