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United States Patent | 3,558,816 |
Wise | January 26, 1971 |
A device providing channel separation of a video signal with the video on one channel being held at unity gain and the gain of the video on the other channel being controlled by an AGC circuit, the video on said channels being recombined thereafter to provide a composite video output signal. The device automatically compensates for video level variations by adjusting the amplitude of peak-white to peak-black video, and at the same time, adjusts video setup to maintain a uniform video output signal. A memory circuit is also incorporated for providing unity gain during absence of an incoming video signal.
Inventors: | Wise; Richard S. (Boulder, CO) |
Assignee: |
Ball Brothers Research Corporation
(Boulder,
CO)
|
Appl. No.: | 04/619,223 |
Filed: | February 28, 1967 |
Current U.S. Class: | 348/683 ; 348/690; 348/695; 348/723 |
Current International Class: | H03G 3/30 (20060101); H04n 005/52 () |
Field of Search: | 178/7.2,7.1DC,6AVC,7.3DC,7.2E 325/404,405,411,158,159,408,409 |
3207998 | September 1965 | Corney et al. |
3324405 | June 1967 | Corney |
2275389 | March 1942 | Feldman |
2881427 | April 1959 | Huber |