Signal level control for video system
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United States of America Patent
Stats
-
Aug 20, 1985
Grant Date -
N/A
app pub date -
Oct 7, 1983
filing date -
Oct 7, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic signal level control for use in a video system using a solid state imager capable of integrating pulsed light images of a target imaged thereon. An automatic gain control is used to adjust the gain of a variable gain amplifier in the output circuit of the image sensor. A strobe lamp is used to illuminate the target during each imaging sequence. The feedback signal to the amplifier is compared to an upper and lower threshold and, in response thereto, the number of pulses generated during each illumination sequence are adjusted to maintain the video signal levels within a desired operating range.
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