The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 2002
Filed:
Sep. 08, 1998
Applicant:
Inventors:
Zaw M. Soe, Santa Clara, CA (US);
Ewunnet Gebre-Selassie, Milpitas, CA (US);
Mingde Pan, Morgan Hill, CA (US);
Assignee:
Fairchild Semiconductor Corporation, South Portland, ME (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/69 ;
U.S. Cl.
CPC ...
H04B 1/69 ;
Abstract
A spread spectrum modulation technique uses digital control logic to switch back and forth between two feedback divider ratios so that the PLL spreads output clock frequency between two limits determined by the ratios. The spread spectrum control logic can be integrated into any PLL frequency synthesizer.