Signal level control for video system

Details Signal level control for video system Signal level control for video system

1983-10-07

1985-08-20

Grieb, William H.

Surgery

Truss

Perineal

358 98, 358168, A61B 104

Patent

active

045357587

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.

REFERENCES:
patent: Re31289 (1983-06-01), Moore et al.
patent: Re31290 (1983-06-01), Moore et al.
patent: 3009989 (1961-11-01), Ahrons et al.
patent: 3879637 (1975-04-01), Woodworth
patent: 3970777 (1976-07-01), Bradford et al.
patent: 4074306 (1978-02-01), Kakinuma et al.
patent: 4423436 (1983-12-01), Kimura
patent: 4475539 (1984-10-01), Konomura

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