Title: Power amplification apparatus, and mobile communication terminal apparatus
Application Number: 200510009312 Application Date: 2005.02.18
Publication Number: 1658496 Publication Date: 2005.08.24
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03G3/20,H03G3/30,H04B1/40
Applicant(s) Name: Sony Corp. Address:
Inventor(s) Name: Kobayashi Tomoo, Kusunoki Shigeo
Attorney & Agent: dang jianhua
Abstract:
     A power amplification apparatus includes, between a first amplification element for amplifying an input signal and a first output terminal, a second amplification element for further amplifying the input signal amplified in the first amplification element to output to the first output terminal, and a first switch element for controlling the second amplification element to be stop condition. Further, between the first amplification element and a second output terminal, a second switch circuit for controlling the supply of an output from the first amplification element to the second output terminal is provided. When outputting a medium power, the operation efficiency of the power amplification apparatus is improved by reducing a power consumption. Thereby, a total operation efficiency of the power amplification apparatus which outputs either the input signal amplified to a large power or the input signal amplified to a medium power by switching is improved.
Time: 14
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