Filter with controlled offsets for active filter selectivity and dc offset control
CA 2373805 A1 · Owner: Pagliolo, Joseph P. · Inventors: Yates, Steven B.; Pagliolo, Joseph P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter is disclosed that actively controls one or more filter characteristics, such as the cut-off frequency of a selected filter pole while minimizing the value of selected filter components such as the capacitor components. This helps improve the performance reliability and yield of the , filter. The filter rejects a selected frequency component or frequency band by actively providing an offset signal that effectively cancels the rejected frequency component or frequency band, while allowing the remaining frequency components or frequency bands to pass relatively freely to the output of the filter. The offset signal may also be used to actively reject a DC offset voltage or …
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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 May 15, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 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.