公开(公告)号：US11290964B2

公开(公告)日：2022-03-29

申请号：US17229412

申请日：2021-04-13

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Satoshi Tanaka ,  Kiichiro Takenaka ,  Takayuki Tsutsui ,  Taizo Yamawaki ,  Shun Imai

IPC: H04W52/24 ,  H04W52/02 ,  H03F3/189 ,  H03F3/24 ,  H04B1/04 ,  H03F1/02 ,  H03F3/19 ,  H03F3/21 ,  H04W88/06

Abstract: A high-frequency signal processing apparatus and a wireless communication apparatus can achieve a decrease in power consumption. For example, when an indicated power level to a high-frequency power amplifier is equal to or greater than a second reference value, envelope tracking is performed by causing a source voltage control circuit to control a high-speed DCDC converter using a detection result of an envelope detecting circuit and causing a bias control circuit to indicate a fixed bias value. The source voltage control circuit and the bias control circuit indicate a source voltage and a bias value decreasing in proportion to a decrease in the indicated power level when the indicated power level is in a range of the second reference value to the first reference value, and indicate a fixed source voltage and a fixed bias value when the indicated power level is less than the first reference value.

公开(公告)号：US11264952B2

公开(公告)日：2022-03-01

申请号：US17024245

申请日：2020-09-17

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Satoshi Tanaka ,  Tetsuaki Adachi ,  Kazuo Watanabe ,  Masahito Numanami ,  Yasuhisa Yamamoto

IPC: H03F3/20 ,  H03F1/02 ,  H03F3/191 ,  H03F1/56 ,  H03F3/193 ,  H03F3/21

Abstract: Provided is a power amplification circuit that includes: an amplifier that amplifies an input signal and outputs an amplified signal; a first bias circuit that supplies a first bias current or voltage to the amplifier; a second bias circuit that supplies a second bias current or voltage to the amplifier; a first control circuit that controls the first bias current or voltage; and a second control circuit that controls the second bias current or voltage. The current supplying capacity of the first bias circuit is different from the current supplying capacity of the second bias circuit.

公开(公告)号：US11190138B2

公开(公告)日：2021-11-30

申请号：US16721062

申请日：2019-12-19

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Satoshi Tanaka ,  Kazuo Watanabe ,  Satoshi Arayashiki

IPC: H03F1/22 ,  H03F1/02 ,  H03F1/56 ,  H03F3/21 ,  H04B1/16 ,  H04B1/04

Abstract: A power amplifier circuit includes a first transistor; a first bias circuit that supplies a first bias current or voltage; a capacitor; a first inductor; a second inductor; a second transistor; a second bias circuit that supplies a second bias current or voltage; a third inductor; a third transistor; a third bias circuit that supplies a third bias current or voltage; and a fourth inductor.

公开(公告)号：US11114982B2

公开(公告)日：2021-09-07

申请号：US16821282

申请日：2020-03-17

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Satoshi Tanaka ,  Kazuo Watanabe ,  Satoshi Arayashiki

IPC: H03F1/30 ,  H03F1/02 ,  H03F3/213

Abstract: A power amplifier circuit includes an amplifier transistor having a first terminal supplied with a power supply voltage that changes in accordance with an amplitude level of an input signal, and a second terminal supplied with the input signal and a bias current, an amplified signal obtained by amplifying the input signal being outputted from the first terminal, a bias circuit that outputs the bias current from an output terminal thereof in accordance with a reference current supplied to an input terminal thereof, and a regulation circuit that generates a regulation current for regulating the bias current in accordance with a change in the power supply voltage. The regulation current increases with an increase in the power supply voltage, and decreases with a decrease in the power supply voltage. The regulation circuit extracts the regulation current from at least one of the reference current or the bias current.

公开(公告)号：US11088720B2

公开(公告)日：2021-08-10

申请号：US16215777

申请日：2018-12-11

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Satoshi Sakurai ,  Satoshi Arayashiki ,  Satoshi Tanaka ,  Kyoichi Hirayama ,  Tomohito Ito ,  Kenta Kurahashi

IPC: H04B1/48 ,  H04B1/00

Abstract: A high-frequency module includes a transmission signal amplifier that outputs a transmission signal to an antenna terminal side; a reception signal amplifier that amplifies a reception signal supplied from an antenna terminal; a switch that selectively connects the antenna terminal to either an output of the transmission signal amplifier or an input of the reception signal amplifier; and a directional coupler that is provided on a transmission signal path and detects a signal level of the transmission signal. The transmission signal amplifier is controlled by a first control signal supplied from a first control circuit. The reception signal amplifier is controlled by a second control signal supplied from a second control circuit. The switch is controlled by a switch control signal supplied from the first control circuit. The directional coupler is controlled by a coupler control signal supplied from the first control circuit.

公开(公告)号：US20210219147A1

公开(公告)日：2021-07-15

申请号：US17142430

申请日：2021-01-06

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Ryuken Mizunuma ,  Satoshi Tanaka ,  Yasuhisa Yamamoto ,  Akiko Itabashi

IPC: H04W16/26 ,  H01Q1/27 ,  H04B17/318

Abstract: A communication terminal device is a glasses-type communication terminal device having an optically transmissive display mounted thereon. The communication terminal device includes first and second radio-frequency modules that perform radio-frequency signal processing and a baseband module that is connected to the first and second radio-frequency modules via communication lines so as to be communicable and that performs baseband signal processing. The first and second radio-frequency modules are selectively switched by the baseband module to perform a reception operation. When the first radio-frequency module performs the reception operation, a reception signal received by the first radio-frequency module is retransmitted from the second radio-frequency module.

公开(公告)号：US11006371B2

公开(公告)日：2021-05-11

申请号：US16989993

申请日：2020-08-11

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Satoshi Tanaka ,  Kiichiro Takenaka ,  Takayuki Tsutsui ,  Taizo Yamawaki ,  Shun Imai

IPC: H04W52/24 ,  H04W52/02 ,  H03F3/189 ,  H03F3/24 ,  H04B1/04 ,  H03F1/02 ,  H03F3/19 ,  H03F3/21 ,  H04W88/06

Abstract: A high-frequency signal processing apparatus and a wireless communication apparatus can achieve a decrease in power consumption. For example, when an indicated power level to a high-frequency power amplifier is equal to or greater than a second reference value, envelope tracking is performed by causing a source voltage control circuit to control a high-speed DCDC converter using a detection result of an envelope detecting circuit and causing a bias control circuit to indicate a fixed bias value. The source voltage control circuit and the bias control circuit indicate a source voltage and a bias value decreasing in proportion to a decrease in the indicated power level when the indicated power level is in a range of the second reference value to the first reference value, and indicate a fixed source voltage and a fixed bias value when the indicated power level is less than the first reference value.

公开(公告)号：US10985712B2

公开(公告)日：2021-04-20

申请号：US16351916

申请日：2019-03-13

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Satoshi Arayashiki ,  Satoshi Goto ,  Satoshi Tanaka ,  Yasuhisa Yamamoto

IPC: H03F3/04 ,  H03F3/68 ,  H03F3/21 ,  H03F1/02 ,  H03F3/193 ,  H03F1/30

Abstract: Provided is a power amplification module that includes: a first transistor, a first signal being inputted to a base thereof; a second transistor, the first signal being inputted to a base thereof and a collector thereof being connected to a collector of the first transistor; a first resistor, a first bias current being supplied to one end thereof and another end thereof being connected to the base of the first transistor; a second resistor, one end thereof being connected to the one end of the first resistor and another end thereof being connected to the base of the second transistor; and a third resistor, a second bias current being supplied to one end thereof and another end thereof being connected to the base of the second transistor.

公开(公告)号：US10608597B2

公开(公告)日：2020-03-31

申请号：US16278242

申请日：2019-02-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuri Honda ,  Fumio Harima ,  Satoshi Tanaka

IPC: H03F3/04 ,  H03F1/56 ,  H03F3/19 ,  H03F3/21 ,  H03F1/30

Abstract: A power amplifier circuit includes an amplifier transistor having a base, a collector, a bias circuit, and a first resistance element connected between the base of the amplifier transistor and the bias circuit. The bias circuit includes a voltage generation circuit, a first transistor having a base to which a first direct-current voltage is supplied, and an emitter from which the bias current or voltage is supplied, a second transistor having a base to which a second direct-current voltage is supplied, and an emitter connected to the emitter of the first transistor, a signal supply circuit disposed between the base of the amplifier transistor and the base of the second transistor, and an impedance circuit disposed between the base of the first transistor and the base of the second transistor.

公开(公告)号：US10284150B2

公开(公告)日：2019-05-07

申请号：US15717161

申请日：2017-09-27

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kazuo Watanabe ,  Satoshi Tanaka ,  Kazuhito Nakai ,  Takayuki Tsutsui

IPC: H03F3/04 ,  H03F1/32 ,  H03F3/19 ,  H03F3/21 ,  H04B1/04 ,  H03F1/02 ,  H03F1/30 ,  H03F3/24

Abstract: A power amplification module includes: a first transistor that amplifies a first radio frequency signal and outputs a second radio frequency signal; a second transistor that amplifies the second radio frequency signal and outputs a third radio frequency signal; and first and second bias circuits that supply first and second bias currents to bases of the first and second transistors. The first bias circuit includes a third transistor that outputs the first bias current from its emitter or source, a capacitor that is input with the first radio frequency signal and connected to the base of the first transistor, a first resistor connected between the emitter or source of the third transistor and the base of the first transistor, a second resistor connected between the capacitor and the emitter or source of the third transistor, and a third resistor connected between the capacitor and the base of the first transistor.