Photodetector-amplifier circuit and optical pickup device

Details Photodetector-amplifier circuit and optical pickup device Photodetector-amplifier circuit and optical pickup device

2005-09-01

2008-12-30

Sohn, Seung C (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140AG, C250S2140LA, C372S038080, C330S308000

Reexamination Certificate

active

07470885

ABSTRACT:
The present invention provides a photodetector-amplifier circuit capable of eliminating an influence of noise due to stray light entering a non-selected photodetector to stably select and switch a photodetector. The photodetector-amplifier circuit of the present invention comprises photodetectors12and13. The photodetector12is connected via a switch16between an inverting input terminal of an operational amplifier11and GND, and is also connected via a switch18to a voltage source Vcc. The photodetector13is connected via a switch17to the inverting input terminal of the operational amplifier11and GND, and is also connected via a switch19to the voltage source Vcc.

REFERENCES:
patent: 5068526 (1991-11-01), Hiroe
patent: 5430290 (1995-07-01), Merle et al.
patent: 5708471 (1998-01-01), Okumura
patent: 5990948 (1999-11-01), Sugiki
patent: 6417504 (2002-07-01), Kozlowski
patent: 6476954 (2002-11-01), Nishizono
patent: 6710915 (2004-03-01), Itoh
patent: 6747264 (2004-06-01), Miida
patent: 6919549 (2005-07-01), Bamji et al.
patent: 7102117 (2006-09-01), Hopper et al.
patent: 2003/0002552 (2003-01-01), Nagara
patent: 2003/0231574 (2003-12-01), Okuda et al.
patent: 2004/0065840 (2004-04-01), Morishita
patent: 2006/0077271 (2006-04-01), Watanabe
patent: 2006/0285563 (2006-12-01), Hakomori
patent: 3134723 (1997-02-01), None
patent: 10-107563 (1998-04-01), None
patent: 2001-202646 (2001-07-01), None
patent: 2004-104269 (2004-04-01), None
patent: WO 02/063761 (2002-08-01), None
Japanese Office Action issued in Japanese Patent Application No. JP 2005-265388, dated Feb. 5, 2008.

Affiliated with

Also associated with

Rating

Photodetector-amplifier circuit and optical pickup device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photodetector-amplifier circuit and optical pickup device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photodetector-amplifier circuit and optical pickup device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4026659