Exposure control circuit of camera
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 20, 1981
Grant Date -
N/A
app pub date -
Jan 7, 1980
filing date -
Mar 2, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An exposure control circuit for camera comprises a photoelectric transducer element which produces an integrated voltage by the photometry of light from an object being photographed. A trigger signal is applied to the transducer element by a trigger switch which is preferably constructed as a semiconductor switch circuit. The trigger switch is connected, through a potential equalizing switch or resistor, between the non-inverting input terminal and the output terminal of an operational amplifier which is arranged to operate as a voltage follower to derive an output voltage equal to the integrated voltage.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully