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公开(公告)号：US11356064B2
公开(公告)日：2022-06-07
申请号：US16867699
申请日：2020-05-06
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Kiichiro Takenaka , Satoshi Arayashiki , Satoshi Sakurai
Abstract: A Doherty amplifier including a main amplifier and a peak amplifier is mounted on a package substrate. A low noise amplifier is further mounted on the package substrate. A transmit/receive switch switches in terms of time between a transmission connection state in which an output signal of the Doherty amplifier is supplied to an antenna and a reception connection state in which a signal received by the antenna is inputted to the low noise amplifier.
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公开(公告)号：US11258468B2
公开(公告)日：2022-02-22
申请号：US16926275
申请日：2020-07-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Atsushi Ono , Satoshi Tanaka , Hirotsugu Mori
Abstract: A radio frequency circuit can transfer radio frequency signals used in first and second communication systems, and includes: a first transfer circuit that transfers a radio frequency signal having a frequency range in a first communication band having first transmission and receiving bands; and a second transfer circuit that transfers a radio frequency signal having a frequency range in a second communication band having second transmission and receiving bands. The radio frequency circuit can simultaneously transmit transmission signals having frequency ranges in the first and second communication bands using the first and second transfer circuits. The first receiving band is lower than the first transmission band, the first transmission band is lower than the second transmission band, and the second transmission band is lower than the second receiving band. The first and second transfer circuits are mounted on different mounting boards.
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公开(公告)号：US11245365B2
公开(公告)日：2022-02-08
申请号：US16828630
申请日：2020-03-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Toshikazu Terashima , Satoshi Tanaka , Kazuo Watanabe , Makoto Itou , Jun Enomoto
Abstract: A power amplifier circuit includes a first transistor, a capacitor, and a second transistor. The first transistor has an emitter electrically connected to a reference potential, a base, and a collector electrically connected to a first power supply potential. A first end of the capacitor is electrically connected to the collector of the first transistor. The second transistor has an emitter electrically connected to a second end of the capacitor and electrically connected to the reference potential, a base, and a collector electrically connected to the first power supply potential. An RF output signal obtained by amplifying the RF input signal is output from the collector of the second transistor. A second bias circuit includes a third transistor having a collector electrically connected to a second power supply potential, a base, and an emitter from which the second bias current or voltage is output.
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公开(公告)号：US11128271B2
公开(公告)日：2021-09-21
申请号：US16720308
申请日：2019-12-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuuma Noguchi , Hidetoshi Matsumoto , Kiichiro Takenaka , Satoshi Tanaka
Abstract: A power supply circuit supplies a variable voltage to a power amplifier that amplifies a radio-frequency signal, and includes a transistor and a current detecting resistor. The transistor includes a collector or drain that is supplied with a fixed voltage from a fixed voltage source, a base or gate that receives an envelope signal tracking an envelope of the radio-frequency signal, and an emitter or source that outputs the variable voltage that is based on the envelope signal. The current detecting resistor is electrically connected between the fixed voltage source and the collector or drain of the transistor.
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公开(公告)号：US11038469B2
公开(公告)日：2021-06-15
申请号：US16878111
申请日：2020-05-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenichi Shimamoto , Satoshi Tanaka , Tadashi Matsuoka
Abstract: A power amplification module includes a first transistor which amplifies and outputs a radio frequency signal input to its base; a current source which outputs a control current; a second transistor connected to an output of the current source, a first current from the control current input to its collector, a control voltage generation circuit connected to the output and which generates a control voltage according to a second current from the control current; a first FET, the drain being supplied with a supply voltage, the source being connected to the base of the first transistor, and the gate being supplied with the control voltage; and a second FET, the drain being supplied with the supply voltage, the source being connected to the base of the second transistor, and the gate being supplied with the control voltage.
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Patent Agency Ranking
公开(公告)号：US10965325B2
公开(公告)日：2021-03-30
申请号：US16285584
申请日：2019-02-26
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Kazuo Watanabe , Tetsuaki Adachi , Masahito Numanami , Yasuhisa Yamamoto
Abstract: A communication unit includes the following elements. A first transmit circuit outputs a first signal or a second signal from a first input signal. A first amplifier amplifies the first signal and outputs a first amplified signal. A first signal generating circuit generates a third signal having a frequency higher than a frequency of the second signal, based on the second signal and a first reference signal. A first filter circuit receives the third signal and allows one of a frequency component representing a sum of the frequency of the second signal and a frequency of the first reference signal and a frequency component representing a difference therebetween to pass through the first filter circuit and attenuates the other one of the frequency components. A second amplifier amplifies the third signal output from the first filter circuit and outputs a second amplified signal.
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公开(公告)号：US20200304070A1
公开(公告)日：2020-09-24
申请号：US16897102
申请日：2020-06-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kazuo Watanabe , Satoshi Tanaka , Norio Hayashi , Kazuma Sugiura
Abstract: The present disclosure is to improve the power added efficiency of a power amplifier at high output power. The power amplifier includes: a first capacitor with a radio frequency signal input to one end thereof; a first transistor whose base is connected to the other end of the first capacitor to amplify the radio frequency signal; a bias circuit for supplying bias to the base of the first transistor; and a second capacitor with one end connected to the base of the first transistor and the other end connected to the emitter of the first transistor.
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公开(公告)号：US10750454B2
公开(公告)日：2020-08-18
申请号：US16744852
申请日：2020-01-16
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Kiichiro Takenaka , Takayuki Tsutsui , Taizo Yamawaki , Shun Imai
IPC: H04W52/24 , H03F1/02 , H03F3/19 , H04W52/02 , H04B1/04 , H03F3/24 , H03F3/189 , 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.
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公开(公告)号：US10715084B2
公开(公告)日：2020-07-14
申请号：US16136359
申请日：2018-09-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Masatoshi Hase , Norio Hayashi , Kazuo Watanabe , Yuuri Honda
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.
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公开(公告)号：US10666201B2
公开(公告)日：2020-05-26
申请号：US16154861
申请日：2018-10-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Hisanori Namie , Satoshi Goto , Satoshi Tanaka
Abstract: A power amplifier module includes a first power amplifier circuit configured to output a first amplified signal obtained by amplifying an input signal; a second power amplifier circuit configured to output a second amplified signal obtained by amplifying the first amplified signal; and a matching network connected between the first power amplifier circuit and the second power amplifier circuit. The matching network includes a first capacitor connected in series between the first power amplifier circuit and the second power amplifier circuit, a second capacitor connected in series between the first capacitor and the second power amplifier circuit, a first inductor connected between a point between the first capacitor and the second capacitor and a ground, and a second inductor connected in series between the first power amplifier circuit and the first capacitor.
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