Control system for camera with multiple opto-sensors

Details Control system for camera with multiple opto-sensors Control system for camera with multiple opto-sensors

1994-04-21

1996-01-02

Gellner, Michael L.

35417311, G03B 700, G03B 7091

Patent

active

054813310

ABSTRACT:
In a photographic camera having a plurality of opto-sensors and a microprocessor-based controller, the opto-sensor output signals are coupled via a common bus connection to an input terminal of the controller. A programmably variable output impedance common to the opto-sensors is selectably set for each corresponding selected opto-sensor such that the output signal for each of the selected opto-sensors is at or above a predetermined threshold value at the input to the controller irrespective of differing current output performance of the individual opto-sensors.

REFERENCES:
patent: 4216868 (1980-08-01), Geppert
patent: 4422745 (1983-12-01), Hopson
patent: 4438425 (1984-03-01), Tsuchida et al.
patent: 4474442 (1984-10-01), Shiuzawa
patent: 5001339 (1991-03-01), Starkey et al.
patent: 5177526 (1993-01-01), Sasayaki et al.
patent: 5231283 (1993-07-01), Starkey et al.
patent: 5253008 (1993-10-01), Konishi et al.

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