Numerically-controlled phase-lock loop with input timing...

Details Numerically-controlled phase-lock loop with input timing... Numerically-controlled phase-lock loop with input timing...

2007-03-22

2010-06-29

Payne, David C (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C375S354000, C375S371000, C375S375000, C455S260000, C455S516000, C327S141000, C327S147000, C327S156000

Reexamination Certificate

active

07746972

ABSTRACT:
A numerically-controlled phase-lock loop with input clock dependent ratio adjustment provides for narrower-bandwidth loops that lock to a wide range of frequencies and/or operation with an absent or degraded input timing reference. A timing reference characteristic detector determines an input frequency range of the input timing reference signal, the data type of the timing reference, and/or whether a timing reference signal of sufficient quality is present. A numerically controlled oscillator is controlled by a numeric ratio that is adjusted to provide the desired clock frequency output in conformity with the detected frequency range and/or data type. If the timing reference signal is absent or degraded, then the numeric ratio can be set to a fixed value or a local timing reference can be applied in order to generate the desired clock output frequency.

REFERENCES:
patent: 5786778 (1998-07-01), Adams et al.
patent: 5828678 (1998-10-01), Mock
patent: 6424185 (2002-07-01), Wolf
patent: 7049852 (2006-05-01), Melanson
patent: 7092476 (2006-08-01), Melanson
patent: 2003/0021370 (2003-01-01), Menkhoff
patent: 2007/0001722 (2007-01-01), Young et al.
patent: WO9933182 (1999-07-01), None
patent: WO2004088845 (2004-10-01), None
U.S. Appl. No. 11/232,650, filed Sep. 22, 2005, Melanson.
U.S. Appl. No. 11/082,347, filed Mar. 17, 2005, Jiang, et al.
U.S. Appl. No. 11/088,446, filed Mar. 24, 2005, Gudmunson, et al.
U.S. Appl. No. 11/082,346, filed Mar. 17, 2005, Gudmunson, et al.
U.S. Appl. No. 11/618,784, filed Dec. 30, 2006, Melanson, et al.

Affiliated with

Also associated with

Rating

Numerically-controlled phase-lock loop with input timing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Numerically-controlled phase-lock loop with input timing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Numerically-controlled phase-lock loop with input timing... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4169755