High frequency signal detecting circuit
CA 2110149 C · Owner: Hori, Tsuguo · Inventors: Hori, Tsuguo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high-frequency-signal detecting circuit is capable of smoothing a mean power in each time slot and of performing, rapid response during a transition time. A detector detects the envelope of a radio-frequency signal whose power level may change depending on the time slot. A filter narrows the pass band in the data field of each time slot and broadens it in the, transition field of the same. The output of the detector is applied to the filter. The detecting circuit therefore, produces an output which is smoothed in the data field without regard to the content of data, and which sharply responds to a change in the power level in the transition field.
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 November 26, 1993 and granted June 10, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2015.
- 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.