Modulation signal detection and determination by statistical estimation
CA 2103215 A1 · Owner: Erickson, Gary J. · Inventors: Erickson, Gary J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A method and apparatus for the demodulation of received frequency modulated (FM) electromagnetic signals. The desired output is estimated from the input by a special mathematical computation performed in the device. A zerocrossing detector is used to provide the information necessary to estimate the output from the input. The method will result in the superior performance of frequency modulated receivers using this device. Phase reversals, missing parts of the transmissions due to shadow effects, and ordinary noise will not affect the receiver using this device. The device consists of an integrated circuit designed to perform this specific task.
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 16, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2015.
- 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.