Spread-spectrum clocking

Details Spread-spectrum clocking Spread-spectrum clocking

2006-04-14

2008-10-14

Lee, Thomas (Department: 2115)

Electrical computers and digital processing systems: support

Clock, pulse, or timing signal generation or analysis

C713S501000, C713S502000, C713S503000

Reexamination Certificate

active

07437590

ABSTRACT:
A state machine circuit may be used to control a multiplexing circuit that selects and provides respective ones of multiple input clock signals to a clock-synthesizing circuit that generates a synthesized clock signal in response to such input clock signals. The state machine circuit may, for example, be configured so that the synthesized clock signal is a spread-spectrum clock signal and/or a clock signal having a nominal frequency that is greater than a nominal frequency of each of the input clock signals.

REFERENCES:
patent: 5488627 (1996-01-01), Hardin et al.
patent: 5631920 (1997-05-01), Hardin
patent: 5867524 (1999-02-01), Booth et al.
patent: 5872807 (1999-02-01), Booth et al.
patent: 6031401 (2000-02-01), Dasgupta
patent: 6157694 (2000-12-01), Larsson
patent: 6167103 (2000-12-01), Hardin
patent: 6292507 (2001-09-01), Hardin et al.
patent: 6366174 (2002-04-01), Berry et al.
patent: 6597226 (2003-07-01), Eade et al.
patent: 6600355 (2003-07-01), Nguyen
patent: 6643317 (2003-11-01), Blumer
patent: 6658043 (2003-12-01), Hardin et al.
patent: 6690219 (2004-02-01), Chuang
patent: 6904112 (2005-06-01), Sattler et al.
patent: 6909311 (2005-06-01), Foley et al.
patent: 6933761 (2005-08-01), Chang
patent: 7010014 (2006-03-01), Percey et al.
patent: 2003/0042954 (2003-03-01), Chuang
patent: 2005/0063503 (2005-03-01), Nandy
patent: 2005/0185731 (2005-08-01), Hardin et al.
patent: 2006/0077275 (2006-04-01), Pan et al.
patent: 2007/0063755 (2007-03-01), Gilliland
patent: 1 505 732 AA (2005-02-01), None
Damphousse, S., et al. “All Digital Spread Spectrum Clock Generator for EMI Reduction,”IEEE Journal of Solid-State Circuits, vol. 42, No. 1, Jan. 2007, pp. 145-150.
Davis, Paul C. et al., A Fully Integrated Timing Generator for the Picture-Phone Video-Telephone Camera, IEEE J. Solid-State Circuits, vol. 4, No. 5, pp. 259-263, Oct. 1969.
Liming, X. et al. “A Flying-Adder Architecture of Frequency and Phase Synthesis with Scalability”IEEE Transactions on Very Large Scale Integration Systems, vol. 10, No. 5, Oct. 2002, pp. 637-649.

Affiliated with

Also associated with

Rating

Spread-spectrum clocking does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4016438