Light detector circuit

Details Light detector circuit Light detector circuit

1982-07-16

1985-05-07

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

307311, H01J 4014

Patent

active

045160198

ABSTRACT:
A light detector circuit is described in which the baseline level of the output signal of a light detector is stabilized by feeding back a control signal to an element that has a voltage variable resistance and is connected in series with the light detector across a voltage source. Several embodiments are shown. In one embodiment a differential amplifier circuit with an integrating feedback circuit is employed to establish a stabilized control voltage.

REFERENCES:
patent: 3576452 (1971-03-01), Smith
patent: 3911268 (1975-10-01), Mori et al.
patent: 4027154 (1977-05-01), Flint
patent: 4032777 (1977-06-01), McCaleb
patent: 4095887 (1978-06-01), van Herten et al.
patent: 4438348 (1984-03-01), Casper et al.
IBM Technical Disclosure Bulletin-"Wide-Response Amplifier With _Automatic Threshold Control", vol. 8, No. 4, Sep. 1965, pp. 690-691.

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