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:
Jan. 30, 2007
Filed:
Sep. 24, 2004
Atsushi Shimatani, Kanagawa, JP;
Atsushi Shimatani, Kanagawa, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
A drive circuit includes a plurality of differential AB class amplifier circuits and a common bias circuit. Each amplifier circuit is configured as a voltage follower to input an analog signal and drive a data line based on the input analog signal. The common bias circuit generates a first bias signal set and a second bias signal set. Each amplifier circuit includes an N-channel differential amplifier circuit, a P-channel differential amplifier circuit that operates independently from the N-channel differential amplifier circuit, and an output stage circuit. The N-channel and P-channel differential amplifier circuits input a differential signal and output first and second output signals onto first and second output lines, respectively, based on the first bias signal set. The output stage circuit generates drive signal from the first and second output signals based on the second bias signal set and outputs the drive signal onto an output terminal.