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:
Dec. 22, 2020
Filed:
Mar. 27, 2020
Applicant:
Texas Instruments Incorporated, Dallas, TX (US);
Inventors:
Abishek Manian, Santa Clara, CA (US);
Michael Gerald Vrazel, Atlanta, GA (US);
Assignee:
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H04L 7/033 (2006.01); H03L 7/087 (2006.01); H03L 7/093 (2006.01); H03L 7/091 (2006.01); H03L 7/095 (2006.01);
U.S. Cl.
CPC ...
H04L 7/033 (2013.01); H03L 7/087 (2013.01); H03L 7/091 (2013.01); H03L 7/093 (2013.01); H03L 7/095 (2013.01);
Abstract
A circuit includes a phase and frequency detector circuit to generate a first phase detect signal indicative of whether a polarity of a first clock is the same as a polarity of a second clock upon occurrence of an edge of a data signal. The second clock being 90 degrees out of phase with respect to the first clock. A lock detect circuit determines, based on the first phase detect signal, that a third clock is one of frequency and phase locked to the data signal, frequency and quadrature locked to the data signal, and not frequency locked to the data signal.