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公开(公告)号：US20150222234A1
公开(公告)日：2015-08-06
申请号：US14589376
申请日：2015-01-05
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto Tabei
CPC classification number: H03F1/0211 , H03F1/0266 , H03F1/301 , H03F1/56 , H03F3/193 , H03F3/195 , H03F3/211 , H03F3/24 , H03F3/45179 , H03F3/45475 , H03F3/72 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/447 , H03F2200/451 , H03F2200/555 , H03F2203/45112 , H03F2203/45528 , H03F2203/45536 , H03F2203/7206 , H03F2203/7215
Abstract: Consumption current may be reduced in a power amplifier module in which a power supply voltage supplied to a power amplification transistor is controlled according to the level of output power. The power amplifier module includes an amplification transistor supplied with the power supply voltage according to the level of output power to amplify a radio-frequency signal, a bias control circuit for generating a bias voltage according to the power supply voltage, and a bias circuit for supplying a bias current according to the bias voltage to the amplification transistor, wherein current flowing through the amplification transistor when the radio-frequency signal is not input is varied according to the level of output power.
Abstract translation: 根据输出功率的电平来控制提供给功率放大晶体管的电源电压的功率放大器模块中的消耗电流可能会降低。 功率放大器模块包括根据输出功率电平提供电源电压的放大晶体管，以放大射频信号;偏置控制电路，用于根据电源电压产生偏置电压;以及偏置电路， 根据偏置电压将偏置电流提供给放大晶体管，其中当没有输入射频信号时流过放大晶体管的电流根据输出功率的电平而变化。
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公开(公告)号：US09948255B2
公开(公告)日：2018-04-17
申请号：US15639397
申请日：2017-06-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto Tabei , Daisuke Watanabe
CPC classification number: H03G1/0035 , H03F1/223 , H03F1/301 , H03F1/56 , H03F1/565 , H03F3/193 , H03F3/245 , H03F2200/18 , H03F2200/222 , H03F2200/294 , H03F2200/301 , H03F2200/387 , H03F2200/447 , H03F2200/451 , H03F2200/492
Abstract: Provided is an amplification circuit that amplifies an input signal and outputs an amplified signal. The amplification circuit includes: an amplification element that outputs the amplified signal from an output terminal thereof; an inductor having one end to which a power supply voltage is supplied and another end that is connected to the output terminal of the amplification element; a variable resistor that is connected in parallel with the inductor; and a resistance value adjusting circuit that adjusts a resistance value of the variable resistor in accordance with the temperature.
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公开(公告)号：US10931193B2
公开(公告)日：2021-02-23
申请号：US16735040
申请日：2020-01-06
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masamichi Tokuda , Makoto Tabei
IPC: H02M3/07 , H02M7/538 , H03K17/04 , H03K17/0412 , H03K17/693
Abstract: A voltage supply circuit includes a level shifter that switches between voltages of two voltage input units and that outputs one of the voltages, a charge pump that transforms a voltage of an input power supply and that applies the transformed voltage to the level shifter, and a charge pump control circuit. The voltage supply circuit controls supply and interruption of a predetermined voltage to a voltage-supplied circuit (RF switch 20). The charge pump control circuit causes the charge pump to perform a continuous operation in an on-mode and to perform an intermittent operation in an off-mode, the off-mode representing a state in which the voltage supply to the voltage-supplied circuit (RF switch 20) is stopped, the on-mode representing a state in which the predetermined voltage is supplied.
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公开(公告)号：US10374561B2
公开(公告)日：2019-08-06
申请号：US15914674
申请日：2018-03-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto Tabei , Daisuke Watanabe
Abstract: Provided is an amplification circuit that amplifies an input signal and outputs an amplified signal. The amplification circuit includes: an amplification element that outputs the amplified signal from an output terminal thereof; an inductor having one end to which a power supply voltage is supplied and another end that is connected to the output terminal of the amplification element; a variable resistor that is connected in parallel with the inductor; and a resistance value adjusting circuit that adjusts a resistance value of the variable resistor in accordance with the temperature.
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公开(公告)号：US11962274B2
公开(公告)日：2024-04-16
申请号：US17401539
申请日：2021-08-13
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tsutomu Oonaro , Masamichi Tokuda , Makoto Tabei , Kazuaki Deguchi , Takayuki Kawano
CPC classification number: H03F1/301 , H03F1/0211 , H03F3/21 , H03F2200/447 , H03F2200/451
Abstract: An amplifier device includes an amplifier including cascade-connected power amplifiers in a plurality of stages and a bias circuit configured to supply bias currents to the amplifier. A bias current supplied to a power amplifier in the first stage of the power amplifiers in the plurality of stages exhibits a positive temperature characteristic. A bias current supplied to a power amplifier in the final stage exhibits a negative temperature characteristic.
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Patent Agency Ranking
公开(公告)号：US11469718B2
公开(公告)日：2022-10-11
申请号：US17078189
申请日：2020-10-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto Tabei , Ken Wakaki , Masamichi Tokuda , Daisuke Watanabe
Abstract: An amplifier circuit amplifies a radio-frequency signal. The amplifier circuit includes an amplifier, an input matching circuit connected to an input side of the amplifier and matches impedance, and a protection circuit connected to a node in a path within a path between an input matching circuit and the amplifier. The protection circuit includes a first diode connected between the node and a ground, and a second diode connected in parallel with the first diode and connected in a direction opposite to the first diode between the node and the ground. A threshold voltage of each of the first diode and the second diode is greater than a maximum voltage amplitude of the input signal at the node and is less than a difference between a withstand voltage of the amplifier and the bias voltage.
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公开(公告)号：US11637532B2
公开(公告)日：2023-04-25
申请号：US17151805
申请日：2021-01-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takashi Kawanami , Makoto Tabei
Abstract: An amplifier circuit includes: a transistor provided between an input terminal and an output terminal and having a gate connected to the input terminal, a source connected to a ground, and a drain connected to the output terminal; an inductor connected between the source and the ground; an inductor connected between the gate and the input terminal, and switches connected to at least one of the inductors and configured to change a mutual inductance of the inductors.
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公开(公告)号：US11451195B2
公开(公告)日：2022-09-20
申请号：US16868842
申请日：2020-05-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto Tabei
Abstract: An amplifying apparatus includes a transistor arranged on a substrate and constituting an amplifier, an input terminal for inputting a high-frequency signal to the amplifier, an output terminal for outputting the high-frequency signal amplified by the amplifier, a first inductor formed in or on the substrate and connected between a source of the transistor and a ground, and a second inductor formed in or on the substrate and connected between a gate of the transistor and the input terminal. When the substrate is viewed in a plan view, the first inductor and the second inductor do not overlap each other. The first inductor and the second inductor are magnetically coupled to each other.
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公开(公告)号：US20180198429A1
公开(公告)日：2018-07-12
申请号：US15914674
申请日：2018-03-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto Tabei , Daisuke Watanabe
CPC classification number: H03G1/0035 , H03F1/223 , H03F1/301 , H03F1/56 , H03F1/565 , H03F3/193 , H03F3/245 , H03F2200/18 , H03F2200/222 , H03F2200/294 , H03F2200/301 , H03F2200/387 , H03F2200/447 , H03F2200/451 , H03F2200/492
Abstract: Provided is an amplification circuit that amplifies an input signal and outputs an amplified signal. The amplification circuit includes: an amplification element that outputs the amplified signal from an output terminal thereof; an inductor having one end to which a power supply voltage is supplied and another end that is connected to the output terminal of the amplification element; a variable resistor that is connected in parallel with the inductor; and a resistance value adjusting circuit that adjusts a resistance value of the variable resistor in accordance with the temperature.
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公开(公告)号：US20180034426A1
公开(公告)日：2018-02-01
申请号：US15639397
申请日：2017-06-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto Tabei , Daisuke Watanabe
CPC classification number: H03G1/0035 , H03F1/223 , H03F1/301 , H03F1/56 , H03F1/565 , H03F3/193 , H03F3/245 , H03F2200/18 , H03F2200/222 , H03F2200/294 , H03F2200/301 , H03F2200/387 , H03F2200/447 , H03F2200/451 , H03F2200/492
Abstract: Provided is an amplification circuit that amplifies an input signal and outputs an amplified signal. The amplification circuit includes: an amplification element that outputs the amplified signal from an output terminal thereof; an inductor having one end to which a power supply voltage is supplied and another end that is connected to the output terminal of the amplification element; a variable resistor that is connected in parallel with the inductor; and a resistance value adjusting circuit that adjusts a resistance value of the variable resistor in accordance with the temperature.
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