Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1977-10-17
1979-11-27
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358176, H04N 140, H04N 552
Patent
active
041763793
ABSTRACT:
Video input circuits are disclosed for a video hard copy controller of the type that converts and formats video signals into digital signals for application to a hard copy generating device. The video input circuits comprise a video amplifier circuit having input terminals for receiving a composite video signal comprised of a video data component and a synchronization component, control terminals for receiving a gain control signal to control the gain of the amplifier circuit, and output terminals at which an amplified composite video signal is developed. An automatic gain control circuit is coupled in feedback relation between the output and control terminals of the amplifier circuit for generating the gain control signal to control the gain of the video amplifier such that, in said amplified composite video signal, the potential difference between first and second portions of the synchronization component thereof substantially constant. A d-c restorer circuit is coupled to the output of the video amplifier circuit for maintaining the first portion of the synchronization component in a predetermined relationship with respect to a predetermined reference potential.
REFERENCES:
patent: 3283067 (1966-11-01), Bazin
patent: 3443026 (1969-05-01), Townsend
patent: 3579123 (1971-05-01), Koga
patent: 3761610 (1973-09-01), Krallinger
patent: 3790706 (1974-02-01), Gubala
Koch Kenneth F.
Wessler Louis E.
Britton Howard W.
Smith Barry Paul
Xerox Corporation
LandOfFree
Video input circuits for video hard copy controller does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Video input circuits for video hard copy controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video input circuits for video hard copy controller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-804994