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. 19, 2021
Filed:
Oct. 05, 2017
Applicant:
Texas Instruments Incorporated, Dallas, TX (US);
Inventors:
Michael Douglas Snedeker, Tucson, AZ (US);
Hugo Cheung, Tucson, AZ (US);
Assignee:
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H03D 3/00 (2006.01); H04L 27/14 (2006.01); H04L 27/227 (2006.01); H04L 27/12 (2006.01); H04B 3/04 (2006.01); H04L 7/00 (2006.01); H04L 25/40 (2006.01);
U.S. Cl.
CPC ...
H04L 27/227 (2013.01); H04B 3/04 (2013.01); H04L 7/0087 (2013.01); H04L 25/40 (2013.01); H04L 27/12 (2013.01); H04L 27/14 (2013.01);
Abstract
A digital demodulator for use with a Highway Addressable Remote Transducer (HART) modem is provided. Analog input signals are digitized according to a sampling clock rate to produce a discrete time signal. Filtering and edge detection allow determinations of 'mark' or 'space' data in a demodulated signal in conjunction with analyzing a detected signal period, a cycle period, count histories and/or an on/off signal period.