Clamping circuit for clamping video signal
CA 1287682 C · Owner: Asano, Yoshikazu · Inventors: Asano, Yoshikazu; Naganawa, Kazuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A frame synchronizing signal detecting circuit detects a frame synchronizing signal in a video signal. When the frame synchronizing signal is not detected by the frame synchronizing signal detecting circuit a clamp, level switching circuit is responsive to a switching signal from a timer circuit for generating alternately an upper clamp potential V+ and a lower, clamp potential V-. When the frame synchronizing signal is detected by the frame synchronizing signal detecting circuit the clamp, level switching circuit generates a normal clamp potential V0. A clamping pulse generating circuit is responsive to an output from the frame synchronizing signal detecting circuit for generating a …
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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 August 13, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2008.
- 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.