Digital spread spectrum frequency synthesizer

Details Digital spread spectrum frequency synthesizer Digital spread spectrum frequency synthesizer

2008-01-01

2008-01-01

Ghayour, Mohammed (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C375S245000, C375S371000, C375S375000, C327S105000

Reexamination Certificate

active

07315602

ABSTRACT:
The present invention provides a digital spread spectrum frequency synthesizer that comprises a noise-shaped quantizer, a divider and an adjustment means. The noise-shaped quantizer is used to quantize a period control word to a time-varying value. The divider is used for generating an output signal by means of dividing a reference signal by the time-varying value, the output signal feeding back to the noise-shaped quantizer so that the noise-shaped quantizer generates the time-varying value in response to the feedback output signal. The adjustment means is used to adjust the period control word by a period offset in response to the output clock. Accordingly, the frequency synthesizer of the present invention can provide a very precise frequency synthesizer featuring a precision spread spectrum clock and jitter stability as well.

REFERENCES:
patent: 4965531 (1990-10-01), Riley
patent: 5825253 (1998-10-01), Mathe et al.
patent: 6236703 (2001-05-01), Riley
patent: 6515553 (2003-02-01), Filiol et al.
patent: 6559698 (2003-05-01), Miyabe
patent: 6717998 (2004-04-01), Adachi et al.
patent: 6876710 (2005-04-01), Pitzer et al.
patent: 6961400 (2005-11-01), Huff et al.

Affiliated with

Also associated with

Rating

Digital spread spectrum frequency synthesizer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital spread spectrum frequency synthesizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital spread spectrum frequency synthesizer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2783971