Method and arrangement for frequency conversion
CA 2273096 A1 · Owner: Telefonaktiebolaget Lm Ericsson · Inventors: Carlsson, Mats; Rydin, Arne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method and an arrangement for frequency conversion for a first information-carrying signal (Uin2) with a frequency (.omega.b) to a second information-carrying signal (UM) with a desired frequency (.omega.ut). A frequency converter (300) comprising an adder (301) is used for adding the signal (Uin2) to an oscillator signal (Uin1) with a predetermined frequency (.omega.a), therewith to obtain a sum signal (Uadd) with said frequencies (.omega.a, .omega.b). An output (304) on the adder (301) is connected to an input (305) on an amplifier (306). The amplifier (306) is designed for non-linear amplification of the sum (Uadd) whereby an output , signal …
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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 November 21, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2019.
- 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.