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:
Jul. 23, 2002
Filed:
Nov. 05, 2001
Fumihiko Kato, Yamagata, JP;
NEC Corporation, Tokyo, JP;
Abstract
An operation amplifier for driving an liquid crystal panel is constructed of: differential stage circuits , drive stage circuits , output transistors to , switching means for switching the connections of the differential stage circuits and the drive stage circuits , and a middle-potential side power source . These differential stage circuits and drive stage circuits are operated between the high-potential side power source and the low-potential side power source . The output transistors are operated between the high-potential side power source and the middle-power side power source , and also the output transistors are operated between the middle-potential side power source and the low-potential side power source , which are alternately driven by the drive stage circuits , respectively.