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公开(公告)号：US20150035607A1
公开(公告)日：2015-02-05
申请号：US14327779
申请日：2014-07-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro Takenaka , Masahiro Ito , Masakazu Hori , Mitsuo Ariie , Hayato Nakamura , Satoshi Arayashiki , Hidetoshi Matsumoto , Tsuyoshi Sato , Satoshi Tanaka
CPC classification number: H03F1/0222 , H03F1/02 , H03F1/0216 , H03F1/0261 , H03F1/32 , H03F1/42 , H03F1/52 , H03F1/56 , H03F3/04 , H03F3/19 , H03F3/21 , H03F2200/102 , H03F2200/408 , H03F2200/411 , H03F2200/444 , H03F2200/451 , H03G3/004
Abstract: Improvement in linearity is achieved at low costs in a power amplifier module employing an envelope tracking system. The power amplifier module includes a first power amplifier circuit that amplifies a radio frequency signal and that outputs a first amplified signal, a second power amplifier circuit that amplifies the first amplified signal on the basis of a source voltage varying depending on amplitude of the radio frequency signal and that outputs a second amplified signal, and a matching circuit that includes first and second capacitors connected in series between the first and second power amplifier circuit and an inductor connected between a node between the first and second capacitors and a ground and that decreases a gain of the first power amplifier circuit as the source voltage of the second power amplifier circuit increases.
Abstract translation: 在采用包络跟踪系统的功率放大器模块中，以低成本实现线性度的改善。 功率放大器模块包括：放大射频信号并输出第一放大信号的第一功率放大器电路;第二功率放大器电路，其根据根据射频幅度变化的源电压放大第一放大信号 信号，并且输出第二放大信号，以及匹配电路，其包括串联连接在第一和第二功率放大器电路之间的第一和第二电容器以及连接在第一和第二电容器之间的节点与地之间的电感器， 随着第二功率放大器电路的源极电压的增加，第一功率放大器电路的增益增加。
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公开(公告)号：US11967978B2
公开(公告)日：2024-04-23
申请号：US18172494
申请日：2023-02-22
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Atsushi Ono , Satoshi Tanaka , Hirotsugu Mori
CPC classification number: H04B1/0067 , H04B1/006 , H04B1/04 , H04W76/16 , H04B2001/0408
Abstract: A radio-frequency circuit is used in simultaneous transfer of a radio-frequency signal of 4G and a radio-frequency signal of 5G, and includes a first transfer circuit that selectively receives the 4G radio-frequency signal or the 5G radio-frequency signal, and transfers a radio-frequency signal of a first communication band including a first transmission band and a first reception band and a radio-frequency signal of a second communication band including a second transmission band and a second reception band. The first and second transmission bands at least partially overlap. The first transfer circuit includes a first power amplifier that amplifies transmission signals of the first and second communication bands, and a first transmission filter that has a first passband including the first and second transmission bands, and passes the transmission signals of the first and second communication bands output from the first power amplifier.
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公开(公告)号：US11901867B2
公开(公告)日：2024-02-13
申请号：US17350385
申请日：2021-06-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuri Honda , Jun Enomoto , Fumio Harima , Satoshi Tanaka
CPC classification number: H03F3/45076 , H03F3/193 , H03F2200/451 , H03F2200/534 , H03F2200/537 , H03F2200/541 , H03F2203/45644
Abstract: A differential amplifier circuit includes a first and second amplifiers that output a differential signal in a radio-frequency band, a first inductor having a first end connected to an output end of the first amplifier, a second inductor having a first end connected to an output end of the second amplifier, a choke inductor connected to second ends of the first and second inductors, a first and second capacitors, and a switch that connects the second capacitor in parallel to the first capacitor or terminates a parallel connection of the first and second capacitors. A resonant circuit formed by connecting the first or second inductor in series with the first capacitor has a different resonant frequency from a resonant circuit formed by connecting the first or second inductor in series with the parallel-connected first and second capacitors. These resonant frequencies correspond to second harmonic frequencies of the differential signal.
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公开(公告)号：US11894816B2
公开(公告)日：2024-02-06
申请号：US17215208
申请日：2021-03-29
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takayuki Tsutsui , Satoshi Tanaka
CPC classification number: H03F3/245 , H03F1/52 , H03F2200/222 , H03F2200/387 , H03F2200/451
Abstract: A power amplifier circuit includes a first amplifier that amplifies a first RF signal and outputs a second RF signal, a second amplifier that amplifies the second RF signal and outputs a third RF signal, a bias circuit that supplies a bias current or voltage to the first or second amplifier, and a bias adjustment circuit that adjusts the bias current or voltage on the basis of the first RF signal, the second RF signal, or the third RF signal. The bias adjustment circuit includes a first diode having an anode to which a control signal indicating a signal based on the first, second, or third RF signal is inputted, and a cathode connected to a ground. The bias circuit includes a bias transistor that outputs the bias current or voltage on the basis of a voltage at the anode of the first diode.
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公开(公告)号：US11824499B2
公开(公告)日：2023-11-21
申请号：US17806524
申请日：2022-06-13
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Hisanori Namie , Mitsunori Samata , Satoshi Tanaka
CPC classification number: H03F1/0205 , H03F1/565 , H03F2200/387 , H03F2200/411 , H03F2200/451 , H03F2200/516
Abstract: A power amplifier circuit includes a first amplifier that amplifies a first signal, and a second amplifier arranged subsequent to the first amplifier. The second amplifier amplifies a second signal that is based on an output signal of the first amplifier. The first amplifier performs class inverse-F operation, and the second amplifier performs class F operation.
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Patent Agency Ranking
公开(公告)号：US11791782B2
公开(公告)日：2023-10-17
申请号：US17123230
申请日：2020-12-16
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masao Kondo , Kiichiro Takenaka , Satoshi Tanaka , Takayuki Tsutsui
CPC classification number: H03F3/213 , H01L23/66 , H01L24/16 , H03F1/565 , H05K1/181 , H01L2223/6655 , H01L2224/16227 , H01L2924/1421 , H01L2924/30111 , H03F2200/222
Abstract: A semiconductor chip includes a plurality of transistor rows. Corresponding to the plurality of transistor rows, a first bump connected to a collector of the transistor is arranged, and a second bump connected to an emitter is arranged. The transistor rows are arranged along sides of a convex polygon. A first land and a second land provided in a circuit board are connected to the first bump and the second bump, respectively. A first impedance conversion circuit connects the first land and the signal output terminal. A plurality of transistors in the transistor row are grouped into a plurality of groups, and the first impedance conversion circuit includes a reactance element arranged for each of the groups.
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公开(公告)号：US11621733B2
公开(公告)日：2023-04-04
申请号：US17501550
申请日：2021-10-14
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Atsushi Ono , Satoshi Tanaka , Hirotsugu Mori
Abstract: A radio-frequency circuit is used in simultaneous transfer of a radio-frequency signal of 4G and a radio-frequency signal of 5G, and includes a first transfer circuit that selectively receives the 4G radio-frequency signal or the 5G radio-frequency signal, and transfers a radio-frequency signal of a first communication band including a first transmission band and a first reception band and a radio-frequency signal of a second communication band including a second transmission band and a second reception band. The first and second transmission bands at least partially overlap. The first transfer circuit includes a first power amplifier that amplifies transmission signals of the first and second communication bands, and a first transmission filter that has a first passband including the first and second transmission bands, and passes the transmission signals of the first and second communication bands output from the first power amplifier.
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公开(公告)号：US11569787B2
公开(公告)日：2023-01-31
申请号：US17211072
申请日：2021-03-24
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：US11476807B2
公开(公告)日：2022-10-18
申请号：US17082990
申请日：2020-10-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shigeki Koya , Takayuki Tsutsui , Yasunari Umemoto , Isao Obu , Satoshi Tanaka
Abstract: A power amplifier module includes a first amplifier circuit that amplifies a radio frequency signal with a first gain corresponding to a first control signal to generate a first amplified signal; a second amplifier circuit that amplifies the first amplified signal with a second gain corresponding to a second control signal to generate a second amplified signal; and a control unit that generates the first control signal and the second control signal. The second control signal is a control signal for increasing a power-supply voltage for the second amplifier circuit as a peak-to-average power ratio of the radio frequency signal increases. The first control signal is a control signal for controlling the first gain of the first amplifier circuit so that a variation in the second gain involved in a variation in the power-supply voltage for the second amplifier circuit is compensated for.
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公开(公告)号：US11388612B2
公开(公告)日：2022-07-12
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 , H04B17/318 , H01Q1/27 , H04W88/04
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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