CPC H03F 3/245 (2013.01) [H03F 1/0288 (2013.01); H03F 3/195 (2013.01); H03F 3/68 (2013.01); H03F 2200/451 (2013.01)] | 20 Claims |
1. A power amplifier module comprising:
a first amplifier configured to amplify a first signal, and to output a second signal;
a power splitter configured to split the second signal into a third signal and a fourth signal;
a second amplifier configured to amplify the third signal, and to output a fifth signal;
a third amplifier configured to amplify the fourth signal, and to output a sixth signal;
a phase shifter configured to receive the fifth signal, and to shift a phase of the fifth signal;
a combining circuit configured to combine the fifth signal phase-shifted by the phase shifter and the sixth signal, and to output an amplified signal of the second signal; and
a controller configured to output, based on an amplitude level of the first signal, a first control signal that controls a power level of the sixth signal output from the third amplifier,
wherein the first control signal is controlled based on a signal whose value is 0 or 1 and the signal is in response to the amplitude level of the first signal.
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