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:
Nov. 23, 2004
Filed:
Oct. 30, 2003
Yukihisa Kinugasa, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
Offset voltage correction apparatus and method correct an input offset voltage in a comparator circuit with a very high accuracy. To detect an input offset voltage in a comparator, a counter circuit performs both up-count and down-count operations on a clock signal. An offset voltage correction circuit obtains a value (counter value) of a counter signal corresponding to an input offset voltage provided at the transition in a comparison signal from “1” to “0” and a value (counter value) of the counter signal corresponding to an input offset voltage provided at the transition from “0” to “1.” The offset voltage correction circuit performs a predetermined arithmetic operation using the counter values. The offset voltage in the comparator is corrected in accordance with this arithmetic operation result.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile