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. 02, 2013
Filed:
Sep. 13, 2012
Kouichi Nishimura, Kanagawa, JP;
Kouichi Nishimura, Kanagawa, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
In an operational amplifier, a control unit switches an operation mode between first and second operation modes. A first output drive stage circuit section is configured to amplify a first input signal differentially-amplified by a first or a second input differential stage circuit section to output as a first drive voltage, similar to a second output drive stage circuit section. First and second power supplies: supply voltages in a first voltage range to the first differential stage circuit section and the first output drive stage circuit section in the first operation mode, supply voltages in the first voltage range to the second differential stage circuit section and the first output drive stage circuit section in the second operation mode, similar to third and fourth power supplies. The drive voltage on each of the first and second output nodes is fed back.