Digital interpolation circuitry
CA 2036809 C · Owner: Shiratsuchi, Shinichi · Inventors: Shiratsuchi, Shinichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sampled data interpolator includes a linear interpolator coupled in parallel with a nonlinear compensation signal path. The nonlinearly processed signals and the linearly interpolated signals are summed to produce interpolated samples. The nonlinear compensation signal path includes a finite impulse response filter having tap weights conforming to a sinc function and a weighting circuit for scaling filtered samples by a normalized sine function.
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 21, 1991 and granted October 24, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 2013.
- 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.