Transmitter using gallium arsenide fet with means for controlling gate bias voltage of the fet for suppressing undesired signal at a start condition of the transmitter
CA 2008594 C · Owner: Kojima, Tatsuru · Inventors: Kojima, Tatsuru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transmitter using a gallium arsenide FET in a power amplifier and having a biassing circuit for generating a gate biassing voltage for the FET a first, power supply for supplying a first power to the biassing circuit and a second power supply for supplying a second power to the power amplifier, the second power being higher in voltage than the first power and being produced at a time delay from production of the first power at a start condition of the transmitter wherein, the first power is supplied to the biassing circuit through a first diode with a voltage drop to thereby reduce the gate biassing voltage below a normal one so that an undesired signal is suppressed at the power …
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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 January 25, 1990 and granted January 4, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 25, 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.