Power amplifier combining network
CA 2108461 C · Owner: Motorola, Inc. · Inventors: Schwent, Dale G.; Osmani, Rashid M.; Weisshappel, Robert N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dual-mode RF signal power amplifier combining network is comprised of two branches, each having a power amplifier (200 and 201). The first branch contains a non-linear mode power amplifier (200) while the second branch contains a linear mode power amplifier (201). The non-linear mode branch also has an RF switch (210). Both branches are coupled to a common output node (220). The common node (220) is coupled to a filter ( l07) before going to an antenna ( 106). The non-linear mode power amplifier (200) operates when an FM signal is to be amplified while the , linear amplifier (201) is biased in an off state. The linear mode power amplifier (201) operates when a digital signal is to be …
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 January 11, 1993 and granted September 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 11, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 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.