Automatic exposure control devices using bi-directional transist

Details Automatic exposure control devices using bi-directional transist Automatic exposure control devices using bi-directional transist

1976-04-13

1978-01-17

Hix, L. T.

G03B 708

Patent

active

040694895

ABSTRACT:
In an exposure control device, a bi-directional bi-polar transistor is connected between a light measuring circuit and a storage capacitor for connecting and disconnecting the storage capacitor from the light measuring circuit. A biasing circuit provides the bias potential to control the bi-directional bi-polar transistor either through a mechanical switch or a semiconductor.

REFERENCES:
patent: 3636372 (1972-01-01), Hujita et al.
patent: 3794509 (1976-08-01), Tsuda et al.

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