Method and apparatus for synthesizing a clock signal having...

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C327S156000, C331S034000

Reexamination Certificate

active

07323917

ABSTRACT:
An apparatus and method of synthesizing an output clock signal from a source clock signal. The clock synthesizer includes a phase generator, a phase selector, a phase interpolator, and control circuitry for controlling the phase selector/interpolator. The phase generator receives a high speed clock, and generates P phases of the source clock to define P phase sectors. The phase selector selects respective pairs of phases such that each pair bounds a respective phase sector. The phase interpolator introduces at least one phase of the source clock between each pair of phases to provide Q phases of the source clock within each sector. The phase interpolator uses the phases of the source clock to produce lagging (leading) phase shifts of 360/P(Q−1) degrees, thereby generating the output clock having a stepped up or stepped down frequency.

REFERENCES:
patent: 5859606 (1999-01-01), Schrader et al.
patent: 6335644 (2002-01-01), Carbone
patent: 6356122 (2002-03-01), Sevalia et al.
patent: 6525615 (2003-02-01), Masenas et al.
patent: 6583655 (2003-06-01), Takahashi et al.
patent: 6650157 (2003-11-01), Amick et al.
patent: 6753712 (2004-06-01), Saeki
patent: 6801066 (2004-10-01), Lee
patent: 6888387 (2005-05-01), Saeki
patent: 2003/0117864 (2003-06-01), Hampel et al.
ECE1352 Analog Integrated Circuits Reading Assignment: Phase Interpolating Circuits, Kostas Pagiamtzis, Nov. 12, 2001, pp. 1-19.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for synthesizing a clock signal having... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for synthesizing a clock signal having..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for synthesizing a clock signal having... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2747338

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.