Camera status display device

Details Camera status display device Camera status display device

1987-09-04

1988-08-09

Gellner, Michael L.

G03B 1736

Patent

active

047631490

ABSTRACT:
A camera status display device containing an integrated circuit. When a digital signal voltage applied to the integrated circuit exceeds a predetermined voltage, the integrated circuit consumes additional current by passing it through a resistance. This prevents the excess current from flowing to an external circuit. The consuming circuit includes a pair of inverters for each digital signal input. In one embodiment, a resistor is connected to the common point of the pair of inverters. In a second embodiment, an AND gate is connected to each of the common points and a resistance is connected to the output of the AND gate.

REFERENCES:
patent: 4269494 (1981-05-01), Shiozawa et al.
patent: 4432628 (1984-02-01), Sakwada et al.
patent: 4547770 (1985-10-01), Suzuki et al.

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