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, 2015
Filed:
Jan. 07, 2014
Qualcomm Incorporated, San Diego, CA (US);
Aniruddha Bashar, Chandler, AZ (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
In one embodiment, a circuit includes a first amplifier having a first differential input, a second differential input, and an output. The replica device is configured to generate a replica current of a current flowing through the battery where the first amplifier controls the control device to control the replica current. The circuit also includes a second amplifier having a third differential input, a fourth differential input, and an output. The second amplifier is configured to compensate for a first offset error of the first amplifier and a second offset error of the second amplifier based on selectively coupling the third differential input to the output of the first amplifier during a first phase, selectively coupling the output of the second amplifier to the second differential input during the first phase, and selectively coupling the output of the second amplifier to the fourth differential input during a second phase.