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:
Oct. 26, 2021
Filed:
Oct. 22, 2020
Applicant:
Texas Instruments Incorporated, Dallas, TX (US);
Inventor:
Maher Mahmoud Sarraj, Plano, TX (US);
Assignee:
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/12 (2006.01); H04B 1/16 (2006.01); H03M 1/38 (2006.01); H03M 1/18 (2006.01);
U.S. Cl.
CPC ...
H03M 1/1245 (2013.01); H03M 1/181 (2013.01); H03M 1/38 (2013.01); H04B 1/16 (2013.01);
Abstract
In described examples, a sample and hold circuit is configured to periodically connect one input of an op-amp to a reference voltage through a switch while a second input of the op-amp is connected to an output of the op-amp. Offset cancellation is performed by storing a sampled offset on a sampling capacitor coupled to the second input of the op-amp.