Variably biased photoelectric circuit

Details Variably biased photoelectric circuit Variably biased photoelectric circuit

1979-11-23

1981-11-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250210, H01J 4014

Patent

active

043026680

ABSTRACT:
A photoelectric circuit is provided with a differential amplifier having two inputs. First and second photosensitive elements and resistors are connected in parallel to each of the two inputs of the differential amplifier, respectively. A second amplifier is provided with its input coupled in parallel to a third resistor and a third photosensitive element. The output of the second amplifier is applied as a bias voltage to each of the three photosensitive elements in parallel.

REFERENCES:
patent: 3850530 (1974-11-01), Uno et al.
patent: 4184071 (1980-01-01), Fryer et al.
Siemens, "Neue fotoelektrische Bauelemente in Anwendungsschaltungen", Technische Mitteilungen Halbleiter, pp. 11 and 12.

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