Light receiving circuit having two switched photodiodes

Details Light receiving circuit having two switched photodiodes Light receiving circuit having two switched photodiodes

2008-01-09

2009-12-08

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S214100

Reexamination Certificate

active

07629567

ABSTRACT:
A light receiving circuit includes a first light receiving element converting an input light to an electric current to output the electric current, a current-voltage conversion circuit converting the electric current to an electric voltage to output the electric voltage, a first switch element connected between the first light receiving element and the current-voltage conversion circuit, and a first current supply element connected between a first voltage source and the first light receiving element and forming an electric current path from the first voltage source to the first light receiving element.

REFERENCES:
patent: 5981936 (1999-11-01), Fujiie
patent: 6818879 (2004-11-01), Yamaguchi et al.
patent: 7408143 (2008-08-01), Yokoyama
patent: 7442913 (2008-10-01), Fukuda et al.
patent: 2006/0054789 (2006-03-01), Miyamoto et al.
patent: 2006/0291348 (2006-12-01), Nakamura
patent: 2007/0075223 (2007-04-01), Murao et al.
patent: 2002-84149 (2002-03-01), None
patent: 2006-109434 (2006-04-01), None

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