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. 03, 2015
Filed:
Jun. 28, 2013
Applicant:
Broadcom Corporation, Irvine, CA (US);
Inventors:
Mahyar Kargar, Irvine, CA (US);
Siavash Fallahi, Newport Coast, CA (US);
Namik Kocaman, San Clemente, CA (US);
Mehdi Khanpour, Irvine, CA (US);
Afshin Momtaz, Laguna Hills, CA (US);
Assignee:
Broadcom Corporation, Irvine, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/091 (2006.01); G01R 23/02 (2006.01); G01R 25/00 (2006.01); H03D 13/00 (2006.01); H03L 7/00 (2006.01); H03L 7/08 (2006.01); H03L 7/113 (2006.01); G01R 23/15 (2006.01);
U.S. Cl.
CPC ...
G01R 23/02 (2013.01); G01R 25/00 (2013.01); H03D 13/00 (2013.01); H03L 7/00 (2013.01); H03L 7/0807 (2013.01); H03L 7/091 (2013.01); H03L 7/113 (2013.01); H03L 2207/06 (2013.01); G01R 23/15 (2013.01);
Abstract
Embodiments provide a reference-less frequency detector that overcomes the 'dead zone' problem of conventional circuits. In particular, the frequency detector is able to accurately resolve the polarity of the frequency difference between the VCO clock signal and the data signal, irrespective of the magnitude of the frequency difference and the presence of VCO clock jitter and/or ISI on the data signal.