Photocurrent-to-voltage conversion apparatus including...

Details Photocurrent-to-voltage conversion apparatus including... Photocurrent-to-voltage conversion apparatus including...

2006-05-16

2006-05-16

Allen, Stephone B. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140RC, C327S514000, C330S308000

Reexamination Certificate

active

07045762

ABSTRACT:
In a photocurrent-to-voltage conversion apparatus for converting a photocurrent flowing through a light receiving element into a detection voltage, an amplifier, a feedback resistor and a clamping MOS transistor are provided. The amplifier has an input connected to the light receiving element and an output for generating the detection voltage, and includes (2n+1) inverter stages connected in series where n is 1, 2 . . . . The feedback resistor and the clamping transistor are connected between the output and input of the amplifier. The clamping MOS transistor is controlled by an output voltage of a non-final inverter one of the inverter stages.

REFERENCES:
patent: 5714909 (1998-02-01), Jackson
patent: 5801588 (1998-09-01), Nishiyama
patent: 5892220 (1999-04-01), Woodward
patent: 6307433 (2001-10-01), Ikeda
patent: 6384689 (2002-05-01), Kimura
patent: 61 041213 (1986-02-01), None
patent: 2557339 (1996-09-01), None
patent: 10 284955 (1998-10-01), None

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