Digital fm modulator
CA 2083079 C · Owner: Hino, Mutsumi · Inventors: Hino, Mutsumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An A/D converter 1 converts analog modulation signals such as video signals and audio signals into digital, modulation signals. A center frequency data setting circuit 6 outputs center frequency data for setting the center frequency of an FM wave. An operation unit 5 outputs such addition data, on the basis of the center frequency data and average frequency data from a counter circuit 4, as will make the average frequency of the FM wave substantially identical with the center frequency that has been set. An adder 2 adds the digital modulation signals and the addition data, and outputs addition digital signals. A DDS 3 accumulates an addition digital signal in every sampling period supplied …
Read the whole patent
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 November 17, 1992 and granted June 22, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 2014.
- 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.