Patent ID: 9705451
Date: 2017-07-11
CPC Classifications: H03F

Claim:
1. A power amplification module including a plurality of power amplification circuits, each of the power amplification circuits comprising: a first transformer including a first input-side winding wire to which a radio frequency signal is input, and a first output-side winding wire electromagnetically coupled to the first input-side winding wire; a first differential amplification circuit including a first transistor, in which a first radio frequency signal output from a first end of the first output-side winding wire is input to a control electrode of the first transistor, and a second transistor, in which a second radio frequency signal output from a second end of the first output-side winding wire is input to a control electrode of the second transistor, the first differential amplification circuit outputting a first amplified signal obtained by amplifying a difference between the first and second radio frequency signals; a second transformer including a second input-side winding wire, to which the first amplified signal is input, for supplying a power-supply voltage that varies according to an amplitude of the radio frequency signal to the first differential amplification circuit, and a second output-side winding wire electromagnetically coupled to the second input-side winding wire; a third transistor connected in parallel with the first transistor and in which the second radio frequency signal is input to a control electrode of the third transistor; and a fourth transistor connected in parallel with the second transistor and in which the first radio frequency signal is input to a control electrode of the fourth transistor.