Power amplifier, radio-frequency power amplification device, and amplification control method

摘要

The present invention allows amplification with low distortion and high efficiency.;A power amplifier of the present invention comprises signal conversion means which generates a digital signal and an analog signal from an input signal that is an amplification target based on a signal generation parameter, a switching amplifier which amplifies the digital signal, a linear amplifier which amplifies the analog signal, and DC level detection means which detect a DC level of at least one of the signal amplified by the linear amplifier and the amplified signal and output a detection result to the signal conversion means, wherein the signal conversion means adjust the signal generation parameter so that the DC level inputted by the DC level detection means is virtually equal to zero.

主权项

1. A power amplifier comprising;
a signal distribution unit which divides an input signal that is an amplification target into a first signal and a second signal; a switching amplifier module which generates a digital signal from said first signal and amplifies said digital signal; a linear amplifier module which amplifies said second signal, detects a DC level of said amplified second signal, and outputs a first detection result to said switching amplifier module as DC level information; and a signal output terminal which outputs a combined signal of said amplified digital signal and said amplified second signal; wherein said switching amplifier module adjusts a signal generation parameter related to the generation of said digital signal so that said DC level is substantially equal to zero.