Patent ID: 9295001
Filing Date: 2016-03-22
CPC Classification: H04W

Claim Text:
1. A signal amplification apparatus comprising: a first modulator configured to receive an envelope signal, use a predetermined reference level to separate the received envelope signal into a first period greater than the reference level and a second period less than the reference level, digitally modulate a signal of the second period to output the digitally modulated signal to a first output terminal, and output a signal of the first period to a second output terminal; a second modulator configured to mix the digital modulated signal input through the first output terminal with a phase modulated carrier signal input from outside the second modulator to output a mixed signal; an envelope modulator configured to output the signal of the first period as a power supply signal; and a power amplifier configured to amplify the mixed signal output by the second modulator using the power supply signal to output an amplified signal.