Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tomoyuki Arai0
Date of Patent
July 28, 2009
0Patent Application Number
120583540
Date Filed
March 28, 2008
0Patent Primary Examiner
Patent abstract
A variable gain amplifier has a first amplifier circuit (106) having a first field-effect transistor and amplifying a signal input to a gate of the first field-effect transistor to output; a gate bias control circuit (102) controlling a gate bias of the first amplifier circuit to control a gain of the first amplifier circuit; and a variable matching circuit (103) controlling a capacitor connected to the gate of the first amplifier circuit to control the gain of the first amplifier circuit.
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