Digital spread spectrum method based on precise phase...

Details Digital spread spectrum method based on precise phase... Digital spread spectrum method based on precise phase...

2011-08-30

2011-08-30

Tse, Young T. (Department: 2611)

Pulse or digital communications

Spread spectrum

Reexamination Certificate

active

08009719

ABSTRACT:
A method and apparatus for generating a spread spectrum reference clock is presented. A method and apparatus is presented for receiving a spread spectrum parameter from a phase lock loop, wherein the spread spectrum parameter includes a multiple-level parameter comprising a plurality of phase signals; quantizing a spread spectrum profile associated with the spread spectrum parameter; mapping the quantized profile; generating control signals based on the mapping, wherein the control signals include an integer control signal and a phase control signal; dividing a phase signal of the plurality of phase signals with the integer control signal; synchronizing the divided phase signal using the phase control signal; and providing a reference clock for a spread spectrum clock generator based on the synchronizing.

REFERENCES:
patent: 7406144 (2008-07-01), Wang
patent: 7639053 (2009-12-01), Shen et al.
patent: 2005/0077935 (2005-04-01), Giuroiu
patent: 2008/0074154 (2008-03-01), Shin
patent: 2008/0201597 (2008-08-01), Chong et al.

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