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:
Jan. 05, 2016
Filed:
Jul. 09, 2014
Applicant:
Skyworks Solutions, Inc., Woburn, MA (US);
Inventors:
Tom Taoufik Bourdi, Irvine, CA (US);
Thomas Obkircher, Santa Ana, CA (US);
Bipul Agarwal, Irvine, CA (US);
Chandra Mohan, Tustin, CA (US);
Assignee:
Skyworks Solutions, Inc., Woburn, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/197 (2006.01); H03M 3/00 (2006.01); H04L 27/00 (2006.01); H03M 7/30 (2006.01); H04L 27/36 (2006.01);
U.S. Cl.
CPC ...
H03L 7/1978 (2013.01); H03M 3/436 (2013.01); H03M 7/3022 (2013.01); H04L 27/00 (2013.01); H04L 27/361 (2013.01);
Abstract
A fractional-N divider of a frequency synthesizer is driven by a dither-less error feedback modulator to alleviate fractional spurious tones introduced by the cyclic train of division ratios from delta-sigma modulators. A first feedback loop generates the feedback signal. A second feedback loop disrupts fractional spurious tones and a third feedback loop provides approximately zero static error.