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:
Sep. 22, 2009
Filed:
Mar. 06, 2008
Kazuhiro Hasegawa, Ichinomiya, JP;
Kazuhiro Hasegawa, Ichinomiya, JP;
Sanyo Electric Co., Ltd., , JP;
Abstract
A rail-to-rail amplifier for amplifying an analog signal from a DAC includes a first differential input section, which includes an n-channel transistor pair, a second differential input section, which includes a p-channel transistor pair, a first current supply provided between the second differential input section and a high voltage side supply, and a current controller for the second input section provided between the first current supply and the second differential input section for controlling the current supply to the second differential input section in accordance with data of a predetermined bit position in input digital data to the DAC. A second current supply is provided between a low voltage side supply and the first differential input section and a current controller for the first input section is provided between the second current supply and the first differential input section for controlling the current supply to the first differential input section in accordance with data of a predetermined bit position in input digital data to the DAC.