Apparatus for stabilizing cut-off frequency using a transconductance
CA 2209666 C · Owner: Kim, Chun Sup · Inventors: Kim, Chun Sup
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for stabilizing cut-off frequency using a transconductance especially used in a high-frequency filter circuit capable of maintaining constant frequency characteristics regardless of noise in association with a clock frequency. changes in the temperature changes in the power supply voltage and errors in fabrication when a filter circuit is installed in an IC (Integrated Circuit) includes a filtering unit for passing only signals having a frequency band predetermined in the IC; a transconductance setting unit installed out of the IC, for controlling a transconductance of the filtering unit; and a controlling unit for controlling a transconductance of the transconductance setting …
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 July 7, 1997 and granted November 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 7, 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.