Squelch circuit
CA 1048631 A · Owner: Rca Corporation · Inventors: Baker, Alfred L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a video disc player a first FM signal, recovered from the disc is subject to frequency demodulation to obtain a composite color video signal and a second FM, signal recovered from the disc is also demodulated to obtain an accompanying sound signal. The player includes a defect detector, monitoring the first FM signal to identify carrier, monitoring the first FM signal to identify carrier frequency departures from the intended deviation range, and switching apparatus for effecting a substitution of stored video signals, in replacement of the output of the video FM detector, when the defect detector identifies such departures. A squelch control signal generator is rendered responsive to an …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.