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:
Apr. 20, 2004
Filed:
Apr. 19, 2002
Applicant:
Inventor:
William D. Llewellyn, San Jose, CA (US);
Assignee:
Tripath Technology, Inc., Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/02 ; G01R 1/900 ; H03K 1/700 ; H03L 5/00 ;
U.S. Cl.
CPC ...
H03F 1/02 ; G01R 1/900 ; H03K 1/700 ; H03L 5/00 ;
Abstract
A differential amplifier includes first and second outputs and first and second supply rails. The differential amplifier further includes offset cancellation circuitry. The offset cancellation circuitry is operable during a calibration mode to generate an offset cancellation signal when the first and second outputs are both coupled to a voltage between the first supply rail and the second supply rail. The offset cancellation signal is for facilitating at least partial cancellation of an offset voltage associated with the first and second outputs during a normal operation mode of the differential amplifier.