Power amplification apparatus and control method
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United States of America Patent
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Oct 25, 2016
Grant Date -
Sep 3, 2015
app pub date -
Feb 19, 2015
filing date -
Feb 28, 2014
priority date (Note) -
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Abstract
A power amplification apparatus generates a code for controlling the number of class D power amplifiers that are in operation among a plurality of class D power amplifiers, changes the duty ratio of a carrier wave signal in accordance with output voltage, and amplifies a transmission signal. A code for decreasing the number of class D power amplifiers in operation is generated when the duty ratio of the carrier wave signal is increased, while a code for increasing the number of class D power amplifiers in operation is generated when the duty ratio of the carrier wave signal is decreased.
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