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:
Nov. 04, 2003
Filed:
Apr. 04, 2002
Applicant:
Inventors:
Oleg Drapkin, Richmond Hill, CA;
Chak Cheung Ho, Markham, CA;
Ngar Sze Chan, Richmond Hill, CA;
Grigori Temkine, Toronto, CA;
Ho Ming Wan, Thornhill, CA;
Assignee:
ATI Technologies, Inc., Ontario, CA;
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/06 ; H03L 7/07 ; H03L 7/16 ;
U.S. Cl.
CPC ...
H03L 7/06 ; H03L 7/07 ; H03L 7/16 ;
Abstract
A spurious-free fractional-N frequency synthesizer circuit is disclosed. The synthesizer circuit includes a multi-phase network circuit operative to provide output signals that are at least a 1/(2n+1)) fractional version of the input signal. The synthesizer circuit includes a phase lock loop (PLL) circuit, with the multi-phase network circuit being coupled to the negative feedback loop of the PLL. The multi-phase network circuit includes a smoothing circuit that removes any jitter present at the output of the PLL.