Doherty power amplifier, and method and device for improving power amplification efficiency of Doherty power amplifier
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United States of America Patent
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Mar 31, 2015
Grant Date -
Oct 16, 2014
app pub date -
May 28, 2014
filing date -
Nov 28, 2011
priority date (Note) -
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Abstract
One aspect of the present invention provides a method for improving power amplification efficiency of a Doherty power amplifier. The method is applied to a Doherty power amplifier that has two paths of Doherty circuit units connected in parallel. The method includes: when output power of the Doherty power amplifier is within a low out power range, adjusting, by a bias circuit, gate voltages of main power amplifiers and peak power amplifiers in the two paths of Doherty circuit units connected in parallel, in order to cause the peak power amplifiers to be in an off state, and the main power amplifiers in the two paths of Doherty circuit units connected in parallel to be in a main power amplification state and a peak power amplification state respectively.
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