Method of programming a frequency synthesizer and a radio having a frequency synthesizer
CA 2198487 C · Owner: Bane, Ronald L. · Inventors: Bane, Ronald L.; Eberhardt, John E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to program the output frequency of a synthesizer such as that of a two-way radio, first the reference oscillator (20) is warped or tuned substantially to one limit of its tuning range. The "N" divisor of the synthesizer divider (13) is then selected to produce a loop output close to the desired loop output frequency. The reference oscillator (20) is then tuned to provide the desired loop output frequency.
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 August 18, 1995 and granted November 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 18, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 18, 2017.
- 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.