High frequency amplifier circuit capable of optimizing a total power consumption
CA 2017904 C · Owner: Nec Corporation · Inventors: Miyazaki, Shinichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a high frequency amplifier circuit comprising an input amplifier device (23) and an output amplifier (21) which are supplied with a total electric power of a supply current value variable dependent on a total power consumption in the input amplifier device and the output amplifier, a current detection circuit (30) detects the supply current value to produce a current detection signal representative of the supply current value. A bias voltage control circuit (31) controls a bias voltage of the output amplifier in response to the current detection signal to make the total power consumption have an optimum value. Preferably the bias voltage control circuit, should comprise a bias voltage …
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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 30, 1990 and granted November 16, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 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.