Method of and apparatus for tuning an aft-controlled channel selecting apparatus to a desired frequency
CA 1072230 A · Owner: Sony Corporation · Inventors: Mogi, Takao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of and apparatus for tuning an AFT-controlled channel selecting apparatus of the type having a storage device for storing digital representations corresponding to predetermined channel frequencies from which a selected representation is read out and converted to a control voltage which is applied to a controllable tuning element included in an electronic tuner. When the control voltage is applied generally it experiences, a gradual increase in magnitude until its predetermined control voltage level is attained. The automatic fine tuning (AFT) circuit may pull in a frequency corresponding to the instantaneous level of the control voltage during the gradual increase in magnitude …
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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 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 1997.
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Timeline
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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.