| 摘要 |
A power amplifier includes an input terminal into which an input signal is input; a first amplification element amplifying the input signal; a second amplification element amplifying an output signal of the first amplification element; an output terminal from which an output signal of the second amplification element is output; a first matching circuit connected between an output of the second amplification element and the output terminal; a first switch connected between an output of the first amplification element and an input of the second amplification element; a second switch having a first end connected to the output of the first amplification element, and a second end; and a second matching circuit having a first end connected to the second end of the second switch, and a second end directly connected to the output of the second amplification element. |
