Exposure time control circuit of shutter of a camera

Details Exposure time control circuit of shutter of a camera Exposure time control circuit of shutter of a camera

1975-02-05

1976-08-31

Hix, L. T.

354 60R, G03B 708

Patent

active

039784983

ABSTRACT:
An exposure time control circuit for an electric shutter of a camera includes a monolithic IC having input circuitry in the form of a transistorized differential amplifier having two input terminals. A time-constant circuit develops a timing signal proportional to the brightness of the object field and applies it to one input terminal and a reference voltage signal is applied to the other input terminal to control the exposure timing. In order to enable varying the reference voltage through a wide range so that the input terminals can also be used for introducing other exposure information variables, such as input signals representative of the F-value, film sensitivity, etc., a transistor is connected between the IC and the source of electric power.

REFERENCES:
patent: 3693518 (1972-09-01), Yamada et al.
patent: 3712192 (1973-01-01), Ono et al.

Affiliated with

Also associated with

Rating

Exposure time control circuit of shutter of a camera does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exposure time control circuit of shutter of a camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exposure time control circuit of shutter of a camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1819141