Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takayuki Matsuzuka0
Kazuya Yamamoto0
Date of Patent
October 13, 2009
Patent Application Number
12098538
Date Filed
April 7, 2008
Patent Primary Examiner
Patent abstract
An amplifier element amplifies RF signals. An emitter follower unit drives the amplifier element at a constant voltage corresponding to a reference voltage supplied to a reference terminal from outside. A current injection unit drives the amplifier element at a constant current corresponding to the reference voltage. An analog control unit analogically controls the output voltage of the emitter follower unit in correspondence with the control voltage supplied to a control terminal from outside. A mode switching unit switches whether the emitter follower unit is operated or not in correspondence with the control voltage.
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