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. 01, 2016
Filed:
Jun. 23, 2015
Applicant:
Qualcomm Incorporated, San Diego, CA (US);
Inventors:
Li Sun, San Diego, CA (US);
Zhi Zhu, San Diego, CA (US);
Miao Li, San Marcos, CA (US);
Xiaohua Kong, San Diego, CA (US);
Assignee:
QUALCOMM Incorporated, San Diego, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 7/00 (2006.01); H04L 7/033 (2006.01);
U.S. Cl.
CPC ...
H04L 7/0025 (2013.01); H04L 7/0008 (2013.01); H04L 7/033 (2013.01);
Abstract
A clock and data recovery (CDR) circuit produces an in-phase clock, a quadrature clock offset by 90 degrees from the in-phase clock, and an auxiliary clock offset from the in-phase clock by a fraction of 90 degrees. A data sampler cyclically samples a data signal to form sets of samples according to the in-phase, quadrature, and auxiliary clocks, each set comprising an in-phase sample, a quadrature sample, and an auxiliary sample. A CDR logic circuit processes the samples to form a timing word for each set.