Battery-voltage indicator of camera

Details Battery-voltage indicator of camera Battery-voltage indicator of camera

1980-12-12

1982-05-04

Adams, Russell E.

354 23D, G03B 1700

Patent

active

043279856

ABSTRACT:
In a voltage indicator of a camera, the voltage value of the battery is converted into digital value through analog-to-digital conversion processing. Such digital signals are digitally expanded by converting equal difference variations thereof into equal ratio variations thereof. The digitally expanded signals are adapted to vary in accordance with variations of the battery voltage. Thus, the expanded digital signals energize an alarm to audibly indicate the value of the battery voltage.

REFERENCES:
patent: 4114176 (1978-09-01), Kawasaki
patent: 4258999 (1981-03-01), Tominaga
patent: 4269494 (1981-05-01), Shiozawa et al.
patent: 4270852 (1981-06-01), Suzuki et al.

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