Frequency down converter using a multitone local oscillator
CA 2477310 A1 · Owner: Manku, Tajinder · Inventors: Manku, Tajinder
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is a need for an inexpensive, high-performance fully-integrable, multi~standard transceiver which suppresses spurious noise signals. The invention provides a topology that satisfies this need providing a first , mixer for receiving an input signal x(t) and mixing it with a multi-tonal , mixing signal .phi.1 to generate an output signal .phi.1 x(t) and providing a , second mixer for receiving the .phi.1 x(t) signal and mixing it with a mono-, tonal mixing signal .phi.2 to generate an output signal .phi.1 .phi.2 x(t). The two mixing signals emulate an LO signal because .phi.1 * .phi.2 has significant power at the frequency of the LO signal being emulated. The topology also includes …
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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 February 25, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 25, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2025.
- 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.