Data segment driven afc latch for bi-phase stable frequency phase locked loop
CA 2186339 C · Owner: Sgrignoli, Gary J. · Inventors: Sgrignoli, Gary J.; Krishnamurthy, Gopalan; Mycynek, Victor G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dual mode AGC system for a television receiver in which data is in the form of symbols occurring at a fixed symbol rate. The symbols are sent in successive data segments each having a sync character. Enablement of an AFC Defeat signal defines an initial interval during which the IF gain is maximum. When the AFC Defeat signal becomes inactive the receiver is operated in a non-coherent mode in which the gain of the IF amplifier is reduced incrementally whenever the IF signal exceeds a clipping level for a period of eight successive symbol clocks. Upon a segment synclock condition occurring a normal coherent mode is entered in which the AGC responds to a signal characteristic, i.e. data …
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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
- Filed March 31, 1995 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 31, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 31, 2017.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.