公开(公告)号：US20230318642A1

公开(公告)日：2023-10-05

申请号：US18331954

申请日：2023-06-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takanori UEJIMA ,  Kiyoshi AIKAWA ,  Masanari MIURA ,  Hiroyuki NAGAMORI

IPC: H04B1/04 ,  H03F3/24 ,  H03F1/56

CPC classification number: H04B1/0483 ,  H03F3/245 ,  H03F1/56 ,  H03F2200/171 ,  H03F2200/451

Abstract: A radio frequency circuit includes a transmit filter for B66-Tx connected to a power amplifier, a transmit filter for B25-Tx connected to a power amplifier, a switch circuit having terminals, a switch circuit having a common terminal and terminals, and a switch circuit having a common terminal and terminals. The terminal is connected to the common terminal, the terminal is connected to the common terminal, the terminal is connected to the transmit filter, and the terminal is connected to the transmit filter. The switch circuit has a smaller stack number than the switch circuit, and the switch circuit has a smaller stack number than the switch circuit.

公开(公告)号：US20210384925A1

公开(公告)日：2021-12-09

申请号：US17411240

申请日：2021-08-25

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroyuki NAGAMORI

IPC: H04B1/00 ,  H04B1/38 ,  H04L5/14

Abstract: Attenuation on a receive path side in a pass band of a second filter is improved in a case where a first filter, which passes a receive signal, is an acoustic wave filter. A multiplexer includes a common terminal, a first terminal, a second terminal, a first filter, and a second filter. The first filter is an acoustic wave filter disposed on a receive path connecting the common terminal and the first terminal and passes a receive signal. The second filter is disposed on a transmit path connecting the common terminal and the second terminal and passes a transmit signal. The multiplexer further includes an LC filter. The LC filter is disposed on the receive path connecting the common terminal and the first terminal.

公开(公告)号：US20200295736A1

公开(公告)日：2020-09-17

申请号：US16817047

申请日：2020-03-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kazuhiro IKARASHI ,  Hiroyuki NAGAMORI

IPC: H03H9/70 ,  H03F3/68 ,  H03H9/05 ,  H03H9/52

Abstract: Provided is a multiplexer that includes a first filter (first transmission filter), a second filter (second reception filter), a third filter (third reception filter), a first inductor, and a second inductor. The first inductor is connected in series with one parallel arm resonator (second parallel arm resonator) of the first filter between the one parallel arm resonator and ground. The second inductor is connected in series with another parallel arm resonator (third parallel arm resonator) of the first filter between the other parallel arm resonator and ground. The first inductor and the second inductor have the same winding direction as each other from the first filter side toward the ground side thereof.