Single integrator system with dual photocells

Details Single integrator system with dual photocells Single integrator system with dual photocells

1989-06-02

1990-07-10

Hix, L. T.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

354461, 354460, 307352, G03B 7087, G03B 7099

Patent

active

049410113

ABSTRACT:
An exposure control circuit for a photographic apparatus that senses visible and infrared scene light with separate light sensing photodiodes employs a single integrator and a separate capacitor for the storage of each scene light integration to sequentially integrate the light levels sensed by such diodes in controlling the amount of image-carrying scene light admitted to the film plane of the apparatus through a scanning aperture. By utilizing a single integrator and separate storage capacitors for each light integration for such light control, a considerable amount of valuable space can be saved in, for example, an integrated circuit over a system where multiple integrators are employed for such purposes.

REFERENCES:
patent: 3753392 (1973-08-01), Land
patent: 3942183 (1976-03-01), Whiteside
patent: 4192587 (1980-03-01), La Rocque et al.
patent: 4357083 (1982-11-01), Johnson et al.
patent: 4444478 (1984-04-01), Kieth et al.
patent: 4491406 (1985-01-01), Johnson
patent: 4651034 (1987-03-01), Sato

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