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公开(公告)号：US11545944B2
公开(公告)日：2023-01-03
申请号：US17151922
申请日：2021-01-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Jun Enomoto , Kazuo Watanabe , Satoshi Tanaka , Yusuke Tanaka , Makoto Ito
Abstract: A power amplifier circuit includes a power amplifier including a first transistor having a first terminal connected to a reference potential, a second terminal to which a first current and a radio-frequency signal are input, and a third terminal connected to a first power supply potential via a first inductor; a capacitor connected to the third terminal of the first transistor; a second transistor including a first terminal connected to the capacitor and the reference potential via a second inductor, a second terminal to which a second current is input and is connected to the reference potential, and a third terminal connected to the first power supply potential via a third inductor and outputs signal; and an adjustment circuit that outputs a third current corresponding to the first power supply potential or a second power supply potential to the second terminal of the second transistor.
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公开(公告)号：US11515840B2
公开(公告)日：2022-11-29
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：US11496168B2
公开(公告)日：2022-11-08
申请号：US17172268
申请日：2021-02-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Hirotsugu Mori , Hidenori Obiya , Morio Takeuchi
IPC: H04B1/04
Abstract: A radio frequency circuit includes an amplifier capable of amplifying a first radio frequency signal and a second radio frequency signal that has a frequency different from a frequency of the first radio frequency signal. Here, the amplifier uses a first power-supply voltage to amplify one of the first radio frequency signal and the second radio frequency signal and uses a second power-supply voltage to amplify both the first radio frequency signal and the second radio frequency signal together. A value of the second power-supply voltage is greater than a value of the first power-supply voltage.
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公开(公告)号：US11336324B2
公开(公告)日：2022-05-17
申请号：US17015477
申请日：2020-09-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Sakurai , Satoshi Arayashiki , Satoshi Tanaka , Kyoichi Hirayama , Tomohito Ito , Kenta Kurahashi
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.
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公开(公告)号：US11323081B2
公开(公告)日：2022-05-03
申请号：US17078876
申请日：2020-10-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Arayashiki , Kazuo Watanabe , Satoshi Tanaka
Abstract: A power amplifier circuit includes lower-stage and upper-stage differential amplifying pairs, a combiner, first and second inductors, and first and second capacitors. First and second signals are input into the lower-stage differential amplifying pair. The upper-stage differential amplifying pair outputs first and second amplified signals. The combiner combines the first and second amplified signals. The lower-stage differential amplifying pair includes first and second transistors. A supply voltage is supplied to the collectors of the first and second transistors. The first and second signals are supplied to the bases of the first and second transistors. The upper-stage differential amplifying pair includes third and fourth transistors. A supply voltage is supplied to the collectors of the third and fourth transistors. The emitters of the third and fourth transistors are grounded via the first and second inductors and are connected to the first and second transistors via the first and second capacitors.
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Patent Agency Ranking
公开(公告)号：US11271298B2
公开(公告)日：2022-03-08
申请号：US16704117
申请日：2019-12-05
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kaoru Sudo , Yasuhisa Yamamoto , Satoshi Tanaka
Abstract: A multi-antenna module includes, on or in the dielectric substrate, a first radiation element, a second radiation element that operates at a frequency band lower than that of the first radiation element, and a ground plane. A first feed line and a second feed line are provided on or in the dielectric substrate. A first switch element switches between a first state in which a signal is supplied to the second radiation element and a second state including at least one of a state in which the second radiation element is connected to the ground plane with terminal impedance interposed therebetween, a state in which the second radiation element is in a floating state with respect to the second feed line and the ground plane, and a state in which the second radiation element is short-circuited to the ground plane.
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公开(公告)号：US11043918B2
公开(公告)日：2021-06-22
申请号：US16589369
申请日：2019-10-01
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Satoshi Arayashiki , Satoshi Goto , Yusuke Tanaka
Abstract: A power amplifier circuit includes a first transistor having an emitter electrically connected to a common potential, a base to which a first high-frequency signal is input, and a collector from which a third high-frequency signal is output; a second transistor having an emitter electrically connected to the common potential, a base to which a second high-frequency signal is input, and a collector from which a fourth high-frequency signal is output; a first capacitance circuit electrically connected between the collector of the second transistor and the base of the first transistor; and a second capacitance circuit electrically connected between the collector of the first transistor and the base of the second transistor.
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公开(公告)号：US10778159B2
公开(公告)日：2020-09-15
申请号：US16192890
申请日：2018-11-16
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Isao Obu , Satoshi Tanaka , Takayuki Tsutsui , Yasunari Umemoto
Abstract: A power amplifier includes initial-stage and output-stage amplifier circuits, and initial-stage and output-stage bias circuits. The initial-stage amplifier circuit includes a first high electron mobility transistor having a source electrically connected to a reference potential, and a gate to which a radio-frequency input signal is inputted, and a first heterojunction bipolar transistor having an emitter electrically connected to a drain of the first high electron mobility transistor, a base electrically connected to the reference potential in an alternate-current fashion, and a collector to which direct-current power is supplied and from which a radio-frequency signal is outputted. The output-stage amplifier circuit includes a second heterojunction bipolar transistor having an emitter electrically connected to the reference potential, a base to which the radio-frequency signal outputted from the first heterojunction bipolar transistor is inputted, and a collector to which direct-current power is supplied and from which a radio-frequency output signal is outputted.
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公开(公告)号：US20200076384A1
公开(公告)日：2020-03-05
申请号：US16549057
申请日：2019-08-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Kazuo Watanabe , Yusuke Tanaka , Satoshi Arayashiki
Abstract: A power amplifier circuit includes a lower transistor having a first terminal, a second terminal connected to ground, and a third terminal, wherein a first power supply voltage is supplied to the first terminal, and an input signal is supplied to the third terminal; a first capacitor; an upper transistor having a first terminal, a second terminal connected to the first terminal of the lower transistor via the first capacitor, and a third terminal, wherein a second power supply voltage is supplied to the first terminal, an amplified signal is outputted to an output terminal from the first terminal, and a driving voltage is supplied to the third terminal; a first inductor that connects the second terminal of the upper transistor to ground; a voltage regulator circuit; and at least one termination circuit that short-circuits an even-order harmonic or odd-order harmonic of the amplified signal to ground potential.
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公开(公告)号：US10454434B2
公开(公告)日：2019-10-22
申请号：US16038770
申请日：2018-07-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tsuyoshi Sato , Hidetoshi Matsumoto , Kiichiro Takenaka , Masahiro Ito , Satoshi Tanaka , Takahiro Katamata
Abstract: A communication unit includes a first input terminal to which a first transmission signal based on a first communication standard is input, a second input terminal to which a second transmission signal based on a second communication standard is input, a first transmission signal amplifier circuit outputting a first amplified transmission signal, or outputting a second amplified transmission signal, a first input-output terminal outputting the first amplified transmission signal or the second amplified transmission signal, and at least one of a first reception signal and a second reception signal inputted to the first input-output terminal, a first reception signal amplifier circuit performing at least one of operation of outputting a first amplified reception signal and operation of outputting a second amplified reception signal, a first output terminal outputting the first amplified reception signal, and a second output terminal outputting the second amplified reception signal.
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