Feedforward amplifier
CA 2347811 C · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Nagano, Junichi; Nakayama, Masatoshi; Horiguchi, Kenichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A feedforward amplifier combines an input signal delayed by a delay circuit 24 with an output signal by a combiner 51; down-converts the output of the combiner 51 to a low frequency by a frequency converter 53; extracts a distortion component from the output of the frequency converter 53; measures the distortion component by a power detector 55; and controls a second vector regulator 11 of a distortion canceling loop 102 by a controller 56 such that the distortion component measured becomes minimum.
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 April 5, 2000 and granted June 24, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 2022.
- 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.