Oscillator frequency divide-down transmit offset scheme for reducing self-quieting
CA 2122735 C · Owner: Marko, Paul D. · Inventors: Borras, Jaime A.; Marko, Paul D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A radio communication device (10) having a receive mode and a transmit mode includes a receiver portion, a transmitter portion, and multiple oscillators for providing reference waveforms for the radio communication device (10). During the receive mode, the receiver portion receives signals having a selected frequency converts received signals to at least a first intermediate frequency (1F), and a transmitter oscillator (44) produces a first waveform having a frequency equal to a multiple of the first intermediate frequency during the receive mode. During the transmit mode the transmitter portion requires a reference waveform having an offset frequency equivalent to the first 1F frequency to …
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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 October 30, 1992 and granted December 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 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
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.