H - Electricity – 04 – N
Patent
H - Electricity
04
N
315/1, 350/47
H04N 5/14 (2006.01) H04N 5/235 (2006.01) H04N 5/225 (2006.01)
Patent
CA 1205183
Abstract of the Disclosure An automatic signal level control for use in a video system using a solid state imager capable of integrating pulsed light im- ages 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 il- lumination sequence are adjusted to maintain the video signal levels within a desired operating range.
458218
Borden Ladner Gervais Llp
Welch Allyn Inc.
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