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. 11, 2008
Filed:
Mar. 19, 2007
Hiroshi Yamaguchi, Osaka, JP;
Shinichi Miyamoto, Kyoto, JP;
Tetsuo Chato, Osaka, JP;
Yasufumi Shirakawa, Osaka, JP;
Yuzo Shimizu, Osaka, JP;
Hiroshi Yamaguchi, Osaka, JP;
Shinichi Miyamoto, Kyoto, JP;
Tetsuo Chato, Osaka, JP;
Yasufumi Shirakawa, Osaka, JP;
Yuzo Shimizu, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An amplifier circuit according to the present invention includes: a first operational amplifier having a negative input terminal, a positive input terminal, and an output terminal; a photodiode connected to the negative input terminal; a first resistor inserted between the output terminal and the negative input terminal; and a second resistor inserted between the output terminal and the positive input terminal, in which the amplifier circuit outputs current from the output terminal via the second resistor.