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公开(公告)号：US10348248B2
公开(公告)日：2019-07-09
申请号：US16002349
申请日：2018-06-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro Takenaka , Masahiro Ito , Masakazu Hori , Mitsuo Ariie , Hayato Nakamura , Satoshi Arayashiki , Hidetoshi Matsumoto , Tsuyoshi Sato , Satoshi Tanaka
IPC: H03F3/04 , H03G3/30 , H03F1/02 , H03F3/21 , H03F1/32 , H03F1/52 , H03F3/19 , H03F1/56 , H03G3/00 , H03F1/42
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.
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公开(公告)号：US10298191B2
公开(公告)日：2019-05-21
申请号：US15890490
申请日：2018-02-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takayuki Tsutsui , Tadashi Matsuoka , Satoshi Tanaka
Abstract: In a power amplifier module for performing slope control of a transmitting signal, a gain variation due to a variation in battery voltage is suppressed while suppressing an increase in circuit size. The power amplifier module includes: a first regulator for outputting a first voltage corresponding to a control voltage for controlling a signal level; a second regulator for outputting a second voltage that rises as a battery voltage drops; a first amplifier supplied with the first voltage as a power-supply voltage to amplify an input signal and output an amplified signal; and a second amplifier for amplifying the amplified signal, wherein the second amplifier includes a first amplification unit supplied with the second voltage as the power-supply voltage to amplify the amplified signal, and a second amplification unit supplied with the battery voltage as the power-supply voltage to amplify the amplified signal.
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公开(公告)号：US10291187B2
公开(公告)日：2019-05-14
申请号：US15904970
申请日：2018-02-26
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuri Honda , Fumio Harima , Satoshi Tanaka
Abstract: A power amplifier circuit includes an amplifier transistor having a base, a collector, a bias circuit, and a first resistance element connected between the base of the amplifier transistor and the bias circuit. The bias circuit includes a voltage generation circuit, a first transistor having a base to which a first direct-current voltage is supplied, and an emitter from which the bias current or voltage is supplied, a second transistor having a base to which a second direct-current voltage is supplied, and an emitter connected to the emitter of the first transistor, a signal supply circuit disposed between the base of the amplifier transistor and the base of the second transistor, and an impedance circuit disposed between the base of the first transistor and the base of the second transistor.
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Patent Agency Ranking
公开(公告)号：US09923533B2
公开(公告)日：2018-03-20
申请号：US15588884
申请日：2017-05-08
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takayuki Tsutsui , Tadashi Matsuoka , Satoshi Tanaka
CPC classification number: H03G3/3042 , G05F1/56 , H03F1/0211 , H03F1/0216 , H03F1/0261 , H03F3/19 , H03F3/193 , H03F3/21 , H03F3/211 , H03F3/245 , H03F2200/18 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/408 , H03F2200/451 , H03F2203/21106 , H03F2203/21142 , H03G3/007 , H03G3/3047
Abstract: In a power amplifier module for performing slope control of a transmitting signal, a gain variation due to a variation in battery voltage is suppressed while suppressing an increase in circuit size. The power amplifier module includes: a first regulator for outputting a first voltage corresponding to a control voltage for controlling a signal level; a second regulator for outputting a second voltage that rises as a battery voltage drops; a first amplifier supplied with the first voltage as a power-supply voltage to amplify an input signal and output an amplified signal; and a second amplifier for amplifying the amplified signal, wherein the second amplifier includes a first amplification unit supplied with the second voltage as the power-supply voltage to amplify the amplified signal, and a second amplification unit supplied with the battery voltage as the power-supply voltage to amplify the amplified signal.
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公开(公告)号：US20170288611A1
公开(公告)日：2017-10-05
申请号：US15629146
申请日：2017-06-21
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenichi Shimamoto , Satoshi Tanaka , Tadashi Matsuoka
CPC classification number: H03F1/0222 , H03F1/0211 , H03F1/0261 , H03F1/30 , H03F1/56 , H03F3/19 , H03F3/193 , H03F3/21 , H03F3/245 , H03F2200/108 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/411 , H03F2200/447 , H03F2200/451 , H03F2200/555
Abstract: A power amplification module includes a first transistor which amplifies and outputs a radio frequency signal input to its base; a current source which outputs a control current; a second transistor connected to an output of the current source, a first current from the control current input to its collector, a control voltage generation circuit connected to the output and which generates a control voltage according to a second current from the control current; a first FET, the drain being supplied with a supply voltage, the source being connected to the base of the first transistor, and the gate being supplied with the control voltage; and a second FET, the drain being supplied with the supply voltage, the source being connected to the base of the second transistor, and the gate being supplied with the control voltage.
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公开(公告)号：US09647775B1
公开(公告)日：2017-05-09
申请号：US15349017
申请日：2016-11-11
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takayuki Tsutsui , Satoshi Tanaka , Hidenori Obiya
CPC classification number: H04B1/0475 , H03F1/0277 , H03F1/32 , H03F3/195 , H03F3/211 , H03F3/24 , H03F3/245 , H03F3/68 , H03F3/72 , H03F2200/111 , H03F2200/318 , H03F2200/408 , H03F2200/411 , H03F2200/451 , H03F2203/7209 , H04B1/0458 , H04B15/00 , H04B2001/0408
Abstract: A power amplification module includes a first input terminal arranged to receive a first transmission signal in a first frequency band, a second input terminal arranged to receive a second transmission signal in a second frequency band higher than the first frequency band, a first amplification circuit that amplifies the first transmission signal, a second amplification circuit that amplifies the second transmission signal, a first filter circuit located between the first input terminal and the first amplification circuit, and a second filter circuit located between the second input terminal and the second amplification circuit. The first filter circuit is a low-pass filter that allows the first frequency band to pass therethrough and that attenuates a harmonic of the first transmission signal and the second transmission signal. The second filter circuit is a high-pass filter that allows the second frequency band to pass therethrough and that attenuates the first transmission signal.
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167.发明授权公开(公告)号：US09451561B2
公开(公告)日：2016-09-20
申请号：US14369216
申请日：2012-12-05
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Kiichiro Takenaka , Takayuki Tsutsui , Taizo Yamawaki , Shun Imai
CPC classification number: H04W52/246 , H03F1/0216 , H03F1/0227 , H03F1/0277 , H03F3/189 , H03F3/19 , H03F3/21 , H03F3/24 , H03F2200/102 , H03F2200/294 , H03F2200/504 , H04B1/0475 , H04W52/0251 , H04W52/0261 , H04W88/06 , Y02D70/00 , Y02D70/1246 , Y02D70/1262 , Y02D70/40
Abstract: A high-frequency signal processing apparatus and a wireless communication apparatus can achieve a decrease in power consumption. For example, when an indicated power level to a high-frequency power amplifier is equal to or greater than a second reference value, envelope tracking is performed by causing a source voltage control circuit to control a high-speed DCDC converter using a detection result of an envelope detecting circuit and causing a bias control circuit to indicate a fixed bias value. The source voltage control circuit and the bias control circuit indicate a source voltage and a bias value decreasing in proportion to a decrease in the indicated power level when the indicated power level is in a range of the second reference value to the first reference value, and indicate a fixed source voltage and a fixed bias value when the indicated power level is less than the first reference value.
Abstract translation: 高频信号处理装置和无线通信装置可以实现功耗的降低。 例如，当向高频功率放大器指示的功率电平等于或大于第二参考值时，通过使源电压控制电路使用检测结果控制高速DCDC转换器来执行包络跟踪 包络检测电路，并使偏置控制电路指示固定的偏置值。 源电压控制电路和偏置控制电路指示当所指示的功率电平在第二参考值到第一参考值的范围内时，源电压和偏置值与指示功率电平的减小成比例地减小，以及 当指示的功率电平小于第一参考值时，指示固定的源极电压和固定的偏置值。
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公开(公告)号：US20160056769A1
公开(公告)日：2016-02-25
申请号：US14932275
申请日：2015-11-04
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro Takenaka , Tsuyoshi Sato , Masahiro Ito , Hidetoshi Matsumoto , Satoshi Tanaka
CPC classification number: H03F1/0205 , H03F1/0211 , H03F1/0222 , H03F3/191 , H03F3/193 , H03F3/211 , H03F3/245 , H03F3/45085 , H03F3/45179 , H03F2200/336 , H03F2200/451 , H03F2200/534 , H03F2200/541 , H03F2200/555 , H03F2200/78 , H03F2203/21106 , H03F2203/45481 , H03F2203/45554 , H03F2203/45638
Abstract: An envelope tracking system is employed in a power amplification module that supports multiple frequency bands. The power amplification module includes multiple power amplification circuits, each of which includes: a first transformer to which a radio frequency signal is input; a differential amplification circuit, in which a first radio frequency signal output from transformer is input to a control electrode and in which a second radio frequency signal output from the transformer is input to a control electrode, the differential amplification circuit outputting an amplified signal obtained by amplifying a difference between the first and second radio frequency signals; and a second transformer for supplying, to the first differential amplification circuit, power-supply voltage varying according to the amplitude of the radio frequency signal and to which the first amplified signal is input.
Abstract translation: 在支持多个频带的功率放大模块中采用包络跟踪系统。 功率放大模块包括多个功率放大电路，每个功率放大电路包括：输入射频信号的第一变压器; 差分放大电路，其中从变压器输出的第一射频信号输入到控制电极，并且其中从变压器输出的第二射频信号输入到控制电极，差分放大电路输出由 放大第一和第二射频信号之间的差; 以及第二变压器，用于向所述第一差分放大电路提供根据所述射频信号的幅度而变化并且被输入所述第一放大信号的电源电压。
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