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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.
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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
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.
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公开(公告)号：US10256848B2
公开(公告)日：2019-04-09
申请号：US15490021
申请日：2017-04-18
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：US20180062579A1
公开(公告)日：2018-03-01
申请号：US15656646
申请日：2017-07-21
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Tetsuaki Adachi , Kazuo Watanabe , Masahito Numanami , Yasuhisa Yamamoto
CPC classification number: H03F1/0205 , H03F1/0261 , H03F1/56 , H03F3/191 , H03F3/193 , H03F3/21 , H03F2200/18 , H03F2200/222 , H03F2200/387 , H03F2200/451 , H03F2200/75
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.
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公开(公告)号：US11227862B2
公开(公告)日：2022-01-18
申请号：US16921379
申请日：2020-07-06
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji Sasaki , Takayuki Tsutsui , Isao Obu , Yasuhisa Yamamoto
IPC: H01L27/02 , H01L23/00 , H01L29/423 , H01L29/08 , H01L29/10 , H01L29/417 , H03F1/52 , H03F3/195 , H01L29/861 , H01L29/06 , H01L29/737 , H03F3/213
Abstract: An amplifier circuit including a semiconductor element is formed on a substrate. A protection circuit is formed including a plurality of protection diodes that are formed on the substrate and that are connected in series with each other, the protection circuit being connected to an output terminal of the amplifier circuit. A pad conductive layer is formed that at least partially includes a pad for connecting to a circuit outside the substrate. An insulating protective film covers the pad conductive layer. The insulating protective film includes an opening that exposes a partial area of a surface of the pad conductive layer, and that covers another area. A first bump is formed on the pad conductive layer on a bottom surface of the opening, and a second bump at least partially overlaps the protection circuit in plan view and is connected to a ground (GND) potential connected to the amplifier circuit.
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Patent Agency Ranking
公开(公告)号：US11133574B2
公开(公告)日：2021-09-28
申请号：US16601875
申请日：2019-10-15
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Ryuken Mizunuma , Satoshi Tanaka , Yasuhisa Yamamoto , Akiko Itabashi
IPC: H01Q1/24 , H04B7/0413 , H01Q1/22 , G06F1/16
Abstract: A communication device includes: a first body including a first display portion; a second body including a second display portion; a communication circuit that carries out millimeter-wave band communication; and one or more millimeter-wave band communication antennas provided in at least one of the first body and the second body.
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公开(公告)号：US11031910B2
公开(公告)日：2021-06-08
申请号：US16917817
申请日：2020-06-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shota Ishihara , Yasuhisa Yamamoto
Abstract: A power amplifier module includes a power amplifier circuit and a control IC. The power amplifier circuit includes a bipolar transistor that amplifies power of an RF signal and outputs an amplified signal. The control IC includes an FET, which serves as a bias circuit that supplies a bias signal to the bipolar transistor. The FET is operable at a threshold voltage lower than that of the bipolar transistor, thereby making it possible to decrease the operating voltage of the power amplifier module.
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公开(公告)号：US10910484B2
公开(公告)日：2021-02-02
申请号：US16058123
申请日：2018-08-08
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji Sasaki , Yasuhisa Yamamoto
IPC: H01L29/739 , H01L29/737 , H01L27/082 , H01L29/08 , H01L29/10 , H01L27/06 , H01L29/417 , H01L29/06 , H01L29/423 , H01L21/8252 , H01L29/66
Abstract: On a single-crystal semiconductor substrate with an upper surface including a first direction in which an inverted mesa step extends and a second direction in which a forward mesa step extends in response to anisotropic etching in which an etching rate depends on crystal plane orientation, a bipolar transistor including a collector layer, a base layer, and an emitter layer that are epitaxially grown, and a base wire connected to the base layer are arranged. A step is provided at an edge of the base layer, and the base wire is extended from inside to outside of the base layer in a direction intersecting the first direction in a plan view. An intersection of the edge of the base layer and the base wire has a disconnection prevention structure that makes it difficult for step-caused disconnection of the base wire to occur.
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公开(公告)号：US10819286B2
公开(公告)日：2020-10-27
申请号：US16205904
申请日：2018-11-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Tetsuaki Adachi , Kazuo Watanabe , Masahito Numanami , Yasuhisa Yamamoto
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.
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公开(公告)号：US10530052B2
公开(公告)日：2020-01-07
申请号：US16038464
申请日：2018-07-18
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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