Invention Application
- Patent Title: AMPLIFIER CIRCUIT AND OPTICAL PICKUP DEVICE
- Patent Title (中): 放大器电路和光学拾取器件
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Application No.: US11687715Application Date: 2007-03-19
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Publication No.: US20070228258A1Publication Date: 2007-10-04
- Inventor: Hiroshi Yamaguchi , Shinichi Miyamoto , Tetsuo Chato , Yasufumi Shirakawa , Yuzo Shimizu
- Applicant: Hiroshi Yamaguchi , Shinichi Miyamoto , Tetsuo Chato , Yasufumi Shirakawa , Yuzo Shimizu
- Applicant Address: JP Osaka
- Assignee: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- Current Assignee: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- Current Assignee Address: JP Osaka
- Priority: JP2006-097024 20060331
- Main IPC: H03F3/08
- IPC: H03F3/08
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.
Public/Granted literature
- US07449670B2 Amplifier circuit and optical pickup device Public/Granted day:2008-11-11
Information query
