Synchronous frequency synthesizer

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

Reexamination Certificate

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Reexamination Certificate

active

07808283

ABSTRACT:
An apparatus for clock generation is presented. In one embodiment, the apparatus comprises a phase interpolator that generates an output with a phase value within reference phases associated with two input clocks. Logic units are coupled to determine a number of phase settings for the phase interpolator. A divider is coupled to the phase interpolator to generate an output clock based on a modifiable divider setting.

REFERENCES:
patent: 6707727 (2004-03-01), Tamura et al.
patent: 7181180 (2007-02-01), Teo et al.
patent: 7256627 (2007-08-01), Talbot et al.
patent: 7312642 (2007-12-01), Li et al.
patent: 7315596 (2008-01-01), Payne et al.
patent: 2004/0212412 (2004-10-01), Saeki
patent: 2006/0001494 (2006-01-01), Garlepp et al.
patent: 2007/0001882 (2007-01-01), Zhang et al.
patent: 2007/0041486 (2007-02-01), Shin
patent: 2008/0063125 (2008-03-01), Chatwin
patent: 2008/0231331 (2008-09-01), Balraj et al.
Shen, D.-S.; Liu, S.-I., “A Low-Jitter Spread Spectrum Clock Generator Using FDMP,” Circuits and Systems II: Express Briefs, IEEE Transactions on , vol. 54, No. 11, pp. 979-983, Nov. 2007.
Damphousse, S.; Ouici, K.; Rizki, A.; Mallinson, M., “All Digital Spread Spectrum Clock Generator for EMI Reduction,” Solid-State Circuits, IEEE Journal of , vol. 42, No. 1, pp. 145-150, Jan. 2007.
Kokubo, M.; Kawamoto, T.; Oshima, T.; Noto, T.; Suzuki, M.; Suzuki, S.; Hayasaka, T.; Takahashi, T.; Kasai, J., “Spread-spectrum clock generator for serial ATA using fractional PLL controlled by Delta-Sigma modulator with level shifter,” Solid-State Circuits Conference, 2005. Digest of Technical Papers. ISSCC. 2005 IEEE International , vol., No., pp. 160-590 vol. 1, Feb. 10-10, 2005.
Yi-Bin Hsieh; Yao-Huang Kao, “A Fully Integrated Spread Spectrum Clock Generator Using Two-Point Delta-Sigma Modulation,” Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on , vol., No., pp. 2156-2159, May 27-30, 2007.
USPTO, “First Office Action”, U.S. Appl. No. 11/726,911, Mailed Jan. 7, 2010, whole document.
Final Office Action for U.S. Appl. No. 11/726,911, Mailed Jul. 2, 2010, 9 pages.

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