Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Atsushi Okamura0
Kazuya Yamamoto0
Takayuki Matsuzuka0
Date of Patent
April 30, 2013
Patent Application Number
13301955
Date Filed
November 22, 2011
Patent Citations Received
Patent Primary Examiner
Patent abstract
A power amplifier includes: an amplifying element having a base into which input signals are inputted, a collector to which a collector voltage is applied, and an emitter; and a bias circuit supplying a bias current to the base of the amplifying element. The bias circuit includes a bias current lowering circuit which lowers the bias current when the collector voltage is lower than a prescribed threshold value.
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