Exposure control circuit for camera

Details Exposure control circuit for camera Exposure control circuit for camera

1977-05-24

1978-06-20

Adams, Russell E.

Oscillators

Relaxation oscillators

354 23D, 331116R, G03B 700

Patent

active

040964965

ABSTRACT:
In an exposure control circuit for a camera including a digital control circuit, a crystal oscillator is used as a pulse generator. Between the crystal oscillator and the power source is connected a small current supply circuit for constantly supplying a small current to the crystal oscillator for constantly maintaining the oscillator in a stable condition.

REFERENCES:
patent: 3725822 (1973-04-01), Eaton, Jr.
patent: 3935546 (1976-01-01), Morozumi et al.
patent: 3979698 (1976-09-01), Gollinger
patent: 4013979 (1977-03-01), Vittoz

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