公开(公告)号：US20200304071A1

公开(公告)日：2020-09-24

申请号：US16898156

申请日：2020-06-10

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Satoshi Tanaka ,  Masatoshi HASE ,  Norio HAYASHI ,  Kazuo WATANABE ,  Yuuri HONDA

IPC: H03F1/02 ,  H03F3/21 ,  H03F1/56 ,  H03F3/19 ,  H03F3/24 ,  H03F3/195

Abstract: A power amplifier circuit includes an amplifier that receives an input signal with an alternating current and outputs an output signal obtained by amplifying power of the input signal to a first node; an inductive element that is connected between the first node and a second node; and a variable capacitor that is connected between the second node and a reference potential, and whose electrostatic capacitance increases as power of the output signal increases.

公开(公告)号：US20200228067A1

公开(公告)日：2020-07-16

申请号：US16829776

申请日：2020-03-25

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takashi YAMADA ,  Yuuri HONDA ,  Satoshi TANAKA

IPC: H03F1/32 ,  H03F3/19 ,  H03F3/21 ,  H03F3/191 ,  H03F1/56 ,  H03F3/24

Abstract: A power amplifier circuit includes a power amplifier that amplifies an input signal and outputs the amplified signal from an output terminal thereof, a first filter circuit that has a frequency characteristic that attenuates an Nth-order harmonic of the amplified signal, N that is an integer greater than or equal to 2, and a second filter circuit that has a frequency characteristic that attenuates the Nth-order harmonic of the amplified signal. The first filter circuit includes a first capacitor and a first inductor. The first capacitor and the first inductor are connected in series between the output terminal and ground. The second filter circuit includes a second capacitor and a second inductor. The second capacitor and the second inductor are connected in series between the output terminal and ground.