Amplifying filter
CA 2116367 A1 · Owner: Jantunen, Heli · Inventors: Jantunen, Heli; Turunen, Aimo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter comprises at least a pair of resonators (RES1,RES2) having an amplifier (AMP) inductively or capacitively coupled between the pair of resonators so that the power of an input signal input at IN passes through the amplifier and output at OUT to provide filtered and amplified output signal. By integrating an amplifier into the filter,this removes the need for an amplifier usually provided externally to the filter,thus saving space in a product incorporating this filter.This filter could be used as part of a duplex filter of a radio transceiver where,for, example,the amplifier could replace one of the stages of a multistage amplifier in the transmission branch of the radio transceiver.
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 February 24, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 24, 2016.
- 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.