Title:
RECEIVED LIGHT AMPLIFICATION CIRCUIT AND OPTICAL DISC DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/064442
Kind Code:
A1
Abstract:
A received light amplification circuit includes: an amplifier (AMP1) which converts a current signal from a light reception element into a voltage signal; differential amplification type amplifiers (AMP2, AMP3) each having a non-reversed input terminal to which the output of the AMP1 is connected; an output terminal to which outputs of the AMP2 and the AMP3 are commonly connected; feedback resistors (R2, R4) each inserted between the reversed input terminals of the AMP2 and the AMP3 and the output terminal; gain resistors (R1, R3) each inserted between the reversed input terminals of the AMP2 and the AMP3 and a reference voltage; a switch (SW1) inserted in series R1 and R2 between the output terminal and the reference voltage; and a switch (SW2) inserted in series to R3 and R4 between the output terminal and the reference voltage. The SW1 and the SW2 control connection between the output terminal and the reference voltage in accordance with a signal (SW) from outside.
Inventors:
MIYAMOTO SHINICHI
FUKUDA HIDEO
FUKUDA HIDEO
Application Number:
PCT/JP2009/006604
Publication Date:
June 10, 2010
Filing Date:
December 03, 2009
Export Citation:
Assignee:
PANASONIC CORP (JP)
MIYAMOTO SHINICHI
FUKUDA HIDEO
MIYAMOTO SHINICHI
FUKUDA HIDEO
International Classes:
H03F3/08; G11B7/13; H03F1/30; H03F3/45; H03F3/68
Foreign References:
| JP2001244555A | 2001-09-07 | |||
| JP2004288243A | 2004-10-14 | |||
| JPS63514U | 1988-01-05 | |||
| JPS61225913A | 1986-10-07 | |||
| JP2003006905A | 2003-01-10 | |||
| JP2005268960A | 2005-09-29 | |||
| JP2006211629A | 2006-08-10 |
Attorney, Agent or Firm:
NII, Hiromori (JP)
New house extensive 守 (JP)
New house extensive 守 (JP)
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