Programmable surface acoustic wave (saw) filter
CA 2398713 A1 · Owner: Kosinski, John · Inventors: Zhu, Jiahua; Pastore, Robert; Lu, Yicheng
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel programmable SAW filter (100) with switchable multi-element interdigital transducers (IDTs) controlled by a microprocessor or a computer is provided that realizes the tunability of both center frequency and 3dB bandwidth of the SAW filter (100). As an example design the center frequency , of the SAW filter (100) provided in a dual in line package (102) ranges from 126.8 MHz to 199.1 MHz, while the 3 dB bandwidth ranges from 18.8 MHz to 58.9 MHz. The multi-input configuration increases the programmability of the device and improves insertion loss. A matching network further improves insertion loss level and stopband attenuation. A resistance weighting method improves in band …
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 1, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 1, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2023.
- 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.