Accession Number : ADD008465

Title :   Composite Video Signal Separator.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Berke,Herbert ; Portoghese,Joseph

Report Date : 22 Apr 1981

Pagination or Media Count : 16

Abstract : This invention overcomes some of the difficulties of the prior art in that it comprises a relatively simple composite video signal separator adapted for separating an incoming composite video signal into a horizontal sync signal, a vertical sync signal, and video information signal. Included in the subject invention are an input terminal adapted to receive a composite video signal which has therein horizontal and vetical sync components and a video component, first separator means adapted to pass the video component of the composite video signal, and second separator means adapted to pass the horizontal and vertical sync components of the composite video signal. A first phase lock loop circuit locks in upon the vertical sync component of the composite video signal so as to provide at the output thereof a vertical sync signal, while a second phase lock loop circuit locks in upon the horizontal sync component of the composite video signal so as to provide at the output thereof a horizontal sync signal. The vertical sync signal is then supplied to a first one-shot multivibrator which expands the pulse width of each sync pulse of the vertical sync signal. Likewise, the horizontal sync signal is supplied to a second one-shot multivibrator which expands the pulse width of each sync pulse of the horizontal sync signal. The aforementioned horizontal and vertical sync signals, and the video signal may then be supplied to any television system or the like for utilization thereby.

Descriptors :   *Patent applications, *Separators, *Video signals, Synchronization(Electronics), Low pass filters, High pass filters, Clipper circuits, Phase locked systems, Control systems

Subject Categories : Electrical and Electronic Equipment
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE