公开(公告)号：US20200153398A1

公开(公告)日：2020-05-14

申请号：US16747636

申请日：2020-01-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takahisa TOYOMURA

IPC: H03F3/24 ,  H03F3/68 ,  H03G3/30

Abstract: A radio-frequency circuit includes a power amplifier circuit, a first switch, a duplexer, a second switch, a capacitor element, and a controller. The first switch includes a first common terminal and first selection terminals. An output signal of the power amplifier circuit is applied to the first common terminal. The duplexer is a filter connected at one terminal to the first selection terminal. The second switch includes a second common terminal and plural second selection terminals. The plural second selection terminals includes the second selection terminal connected to the other terminal of the duplexer. The capacitor element is built in the first switch. The controller controls the gain of the power amplifier circuit in accordance with a monitor signal obtained via the capacitor element so as to regulate the maximum output level of the power amplifier circuit.

公开(公告)号：US20240333323A1

公开(公告)日：2024-10-03

申请号：US18624196

申请日：2024-04-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Reiji NAKAJIMA ,  Takahisa TOYOMURA ,  Kazuhiro UEDA

IPC: H04B1/04 ,  H04B1/00

CPC classification number: H04B1/0483 ,  H04B1/006 ,  H04B1/0458

Abstract: A radio frequency module includes a first power amplifier, a second power amplifier, and a matching circuit. The matching circuit is connected to an output terminal of the second power amplifier and is connected to a reception path. The matching circuit includes at least one capacitor, an inductor connected in series to the at least one capacitor, and a selection switch. The matching circuit switches between an impedance matching function and a harmonic wave suppression function of reducing harmonic wave noise outputted from the first power amplifier by switching a state of the selection switch.

公开(公告)号：US20230319984A1

公开(公告)日：2023-10-05

申请号：US18332251

申请日：2023-06-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Tetsuro HARADA ,  Dai NAKAGAWA ,  Yuji TAKEMATSU ,  Hiroaki TAKAOKA ,  Takahisa TOYOMURA

IPC: H05K1/02

CPC classification number: H05K1/0243 ,  H05K2201/1003 ,  H05K2201/10098

Abstract: Detection accuracy is improved with a reduced size. A radio-frequency module includes an antenna terminal, a signal input terminal, a signal output terminal, a mounting substrate, a chip inductor, and a directional coupler. The mounting substrate has a first major surface and a second major surface opposite to each other. The chip inductor is mounted on the first major surface of the mounting substrate. The chip inductor is provided in at least one of a transmitting path between the antenna terminal and the signal input terminal and a receiving path between the antenna terminal and the signal output terminal. The directional coupler is mounted on the second major surface of the mounting substrate, and at least part of the directional coupler is provided in the transmitting path.