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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
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：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
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.
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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
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.
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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
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.
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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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Patent Agency Ranking
公开(公告)号：US10236828B2
公开(公告)日：2019-03-19
申请号：US15684258
申请日：2017-08-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kazuma Sugiura , Takashi Yamada , Norio Hayashi , Satoshi Tanaka , Kenichi Shimamoto , Kazuo Watanabe
Abstract: A power amplifier has improved power added efficiency at high output power. The power amplifier includes: a first transistor for amplifying an input signal input to the base thereof and outputting the amplified signal from the collector thereof; a second transistor with power-supply voltage applied to the collector thereof to supply bias voltage or bias current from the emitter thereof to the base of the first transistor; a third transistor whose collector is connected to the collector of the first transistor to amplify the input signal input to the base thereof and output the amplified signal from a collector thereof; a fourth transistor whose base and collector are connected to supply bias from the emitter thereof to the base of the third transistor; and a first resistor with bias control voltage applied to one end thereof and the other end connected to the bases of the second and fourth transistors.
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公开(公告)号：US10135395B2
公开(公告)日：2018-11-20
申请号：US15821054
申请日：2017-11-22
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Masatoshi Hase , Yuri Honda , Kazuo Watanabe , Takashi Soga
Abstract: A power amplifier circuit includes a first transistor, a second transistor, a first bias circuit supplying a first bias current or voltage, a second bias circuit supplying a second bias current or voltage, a first inductor, and a first capacitor. A power supply voltage is supplied to a collector of the first transistor, and an emitter thereof is grounded. A radio frequency signal and the first bias current or voltage are supplied to a base of the first transistor. The power supply voltage is supplied to a collector of the second transistor, and an emitter thereof is connected to the collector of the first transistor via the first capacitor and is grounded via the first inductor. The second bias current or voltage is supplied to a base of the second transistor. An amplified radio frequency signal is output from the collector of the second transistor.
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公开(公告)号：US20180287562A1
公开(公告)日：2018-10-04
申请号：US16001658
申请日：2018-06-06
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Masatoshi Hase , Yuri Honda , Kazuo Watanabe , Takashi Soga
CPC classification number: H03F1/0211 , H03F1/0261 , H03F1/22 , H03F1/56 , H03F1/565 , H03F3/195 , H03F3/213 , H03F3/245 , H03F2200/222 , H03F2200/387 , H03F2200/411 , H03F2200/451 , H03F2200/516
Abstract: A power amplifier circuit includes a first transistor, a second transistor, a first bias circuit supplying a first bias current or voltage, a second bias circuit supplying a second bias current or voltage, a first inductor, and a first capacitor. A power supply voltage is supplied to a collector of the first transistor, and an emitter thereof is grounded. A radio frequency signal and the first bias current or voltage are supplied to a base of the first transistor. The power supply voltage is supplied to a collector of the second transistor, and an emitter thereof is connected to the collector of the first transistor via the first capacitor and is grounded via the first inductor. The second bias current or voltage is supplied to a base of the second transistor. An amplified radio frequency signal is output from the collector of the second transistor.
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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：US09825594B2
公开(公告)日：2017-11-21
申请号：US15274313
申请日：2016-09-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kazuo Watanabe , Satoshi Tanaka , Kazuhito Nakai , Takayuki Tsutsui
CPC classification number: H03F1/3205 , H03F1/02 , H03F1/0261 , H03F1/302 , H03F1/32 , H03F3/19 , H03F3/211 , H03F3/24 , H03F3/245 , H03F2200/18 , H03F2200/21 , H03F2200/451 , H03F2201/3215 , H03F2203/21106 , H04B1/0475 , H04B2001/045
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.
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