Adjustment of photoconductive cell

Details Adjustment of photoconductive cell Adjustment of photoconductive cell

1997-04-02

1999-07-13

Allen, Stephone

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214AL, 250206, 315 82, 359265, H01J 4014

Patent

active

059230282

ABSTRACT:
A system and method for optimizing the signal range of a photocell for all ambient lighting conditions. A switched resistor circuit is serially connected to the photocell. The duty cycle of the switched resistor circuit is controlled to provide an optimal signal range for the photocell in both light and dark ambient light conditions.

REFERENCES:
patent: 4902108 (1990-02-01), Byker
patent: 5193029 (1993-03-01), Schofield et al.
patent: 5424898 (1995-06-01), Larson et al.
patent: 5451822 (1995-09-01), Bechtel et al.
patent: 5486952 (1996-01-01), Nagao et al.
patent: 5550677 (1996-08-01), Schofield et al.
patent: 5581406 (1996-12-01), Kobayashi et al.

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