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:
Mar. 29, 2016
Filed:
Dec. 02, 2014
Applicant:
Mediatek Inc., Hsin-Chu, TW;
Inventors:
Assignee:
MEDIATEK INC., Science-Based Industrial Park, Hsin-Chu, TW;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/099 (2006.01); H03M 3/00 (2006.01);
U.S. Cl.
CPC ...
H03L 7/0991 (2013.01); H03M 3/30 (2013.01);
Abstract
A frequency synthesizer includes a digitally controlled oscillator, a sigma-delta modulation circuit and a controller. The digitally controlled oscillator is arranged to generate an oscillating clock. The sigma-delta modulation circuit is arranged to generate an SDM input to the digitally controlled oscillator. The controller is arranged to adjust an operating frequency of the SDM circuit in response to a transmit power level of a transmitter using the oscillating clock.