Biasing circuitry for a diode detector
CA 2009381 C · Owner: Saarnimo, Timo · Inventors: Saarnimo, Timo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a biasing circuitry in a power level detector used for power control of a high-frequency power amplifier. According to the invention to compensate, for variation caused in the detector diode (D) threshold voltage by temperature changes, a constant-power source (T R1, R2) is used by means of which the operating point of the detector diode (D) is set at a constant level and close to the angle point of the threshold voltage of the diode (D).
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 6, 1990 and granted November 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2012.
- 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.