Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yasutaka Sugimoto0
Date of Patent
October 22, 2024
0Patent Application Number
174815980
Date Filed
September 22, 2021
0Patent Citations
Patent Primary Examiner
Patent abstract
An amplifier circuit includes an input terminal to which a radio frequency signal is input, an amplifier transistor that has a control terminal and amplifies the radio frequency signal, a bias circuit that includes an emitter-follower circuit or a source-follower circuit and supplies a bias current to the control terminal of the amplifier transistor, an inductor arranged in series between an emitter of the emitter-follower circuit and the control terminal of the amplifier transistor or between a source of the source-follower circuit and the control terminal of the amplifier transistor, and a variable resistance circuit connected to the inductor.
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