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:
Jul. 27, 2010
Filed:
Jun. 14, 2007
Applicants:
Zhuo Fu, San Diego, CA (US);
Susumu Hara, Austin, CA (US);
Inventors:
Zhuo Fu, San Diego, CA (US);
Susumu Hara, Austin, CA (US);
Assignee:
Silicon Laboratories Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A divider control circuit includes a first and a second delta sigma modulator configured to generate a divider control signal for a fractional-N divider and a fractional signal indicative of a phase error in the divider output. The fractional signal is supplied for control of an interpolator circuit. The divider control circuit may be implemented as a look-ahead circuit where two or more divider control signals and fractional signals are generated during a single cycle to allow the divider control circuit to be run at a reduced clock rate.