Patent ID: 9577580
Date: 2017-02-21
CPC Classifications: H03F,H03G

Claim:
1. A power amplifier module comprising: a first power amplifier circuit configured to amplify a radio frequency signal and output a first amplified signal; a second power amplifier circuit configured to amplify the first amplified signal on the basis of a source voltage varying depending on amplitude of the radio frequency signal and output a second amplified signal; a matching circuit configured to include first and second capacitors connected in series between the first and second power amplifier circuits and an inductor connected between a node between the first and second capacitors and a ground and decrease a gain of the first power amplifier circuit as the source voltage of the second power amplifier circuit increases; and a third capacitor connected in series to the inductor, wherein the first and second power amplifier circuits and the first and second capacitors are formed on a single chip, and wherein the single chip includes: