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公开(公告)号：US09106181B2
公开(公告)日：2015-08-11
申请号：US14552597
申请日：2014-11-25
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masahiro Ito , Kiichiro Takenaka , Satoshi Tanaka , Hidetoshi Matsumoto
CPC classification number: H03F1/0205 , H03F1/02 , H03F1/0227 , H03F1/32 , H03F1/3223 , H03F1/56 , H03F3/193 , H03F3/195 , H03F3/213 , H03F3/245 , H03F2200/18 , H03F2200/222 , H03F2200/318 , H03F2200/372 , H03F2200/387 , H03F2200/411 , H03F2200/451
Abstract: Linearity and power efficiency in a power amplifier circuit are enhanced. The power amplifier circuit includes a first transistor that amplifies a signal input to the base and that outputs the amplified signal from the collector and a first capacitor that is disposed between the base and the collector of the first transistor and that has voltage dependency of a capacitance value lower than that of a base-collector parasitic capacitance value of the first transistor.
Abstract translation: 增强了功率放大器电路中的线性和功率效率。 功率放大器电路包括：第一晶体管，其放大输入到基极的信号并输出来自集电极的放大信号;以及第一电容器，其设置在第一晶体管的基极和集电极之间，并且具有电容的电压依赖性 的值低于第一晶体管的基极 - 集电极寄生电容值的值。
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公开(公告)号：US10797657B2
公开(公告)日：2020-10-06
申请号：US16217506
申请日：2018-12-12
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro Takenaka , Masahiro Ito , Tsuyoshi Sato , Kozo Sato , Hidetoshi Matsumoto
Abstract: A matching network is a matching network of a power amplifier circuit that outputs a signal obtained by a differential amplifier amplifying power of a high-frequency signal. The matching network includes an input-side winding connected between differential outputs of the differential amplifier; an output-side winding that is coupled to the input-side winding via an electromagnetic field and whose one end is connected to a reference potential; a first LC series resonant circuit including a capacitive element and an inductive element connected in series with each other, and being connected in parallel with the input-side winding; and a second LC series resonant circuit including a capacitive element and an inductive element connected in series with each other, and being connected in parallel with the output-side winding.
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公开(公告)号：US10742172B2
公开(公告)日：2020-08-11
申请号：US16104305
申请日：2018-08-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro Takenaka
Abstract: A power amplifier includes a power splitter that splits a first signal into a second signal and a third signal, a first amplifier that amplifies the second signal within an area where the first signal has a power level greater than or equal to a first level and that outputs a fourth signal, a second amplifier that amplifies the third signal within an area where the first signal has a power level greater than or equal to a second level higher than the first level and that outputs a fifth signal, an output unit that outputs an amplified signal of the first signal, a first and a second LC parallel resonant circuit, and a choke inductor having an end to which a power supply voltage is supplied and another end connected to a node of the first and second LC parallel resonant circuits.
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公开(公告)号：US10601382B2
公开(公告)日：2020-03-24
申请号：US16188582
申请日：2018-11-13
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro Takenaka
Abstract: A power amplifier circuit includes: a first differential amplifier that amplifies a first signal split from the input signal and outputs a second signal; a second differential amplifier that amplifies a third signal split from the input signal and outputs a fourth signal; a first transformer including a first input-side winding to which the second signal is input and a first output-side winding; a second transformer including a second input-side winding to which the fourth signal is input and a second output-side winding; a first phase conversion element that is connected in parallel with the first output-side winding and outputs a fifth signal; and a second phase conversion element that is connected in parallel with the second output-side winding and outputs a sixth signal. The first and second output-side windings are connected in series and output a signal obtained by adding voltages of the fifth and sixth signals together.
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公开(公告)号：US10594341B2
公开(公告)日：2020-03-17
申请号：US16274391
申请日：2019-02-13
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tsuyoshi Sato , Hidetoshi Matsumoto , Kiichiro Takenaka , Masahiro Ito , Satoshi Tanaka
Abstract: A high-frequency-signal transceiver circuit transmits and receives a signal between first to sixth antenna terminals and terminals near a high-frequency circuit. The high-frequency-signal transceiver circuit includes first to sixth circuits connected to the corresponding first to sixth antenna terminals. One of the first to sixth circuits transmits and receives only a signal of time division multiplexing communication.
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Patent Agency Ranking
公开(公告)号：US20190028074A1
公开(公告)日：2019-01-24
申请号：US16038770
申请日：2018-07-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tsuyoshi Sato , Hidetoshi Matsumoto , Kiichiro Takenaka , Masahiro Ito , Satoshi Tanaka , Takahiro Katamata
CPC classification number: H03F3/245 , H03F3/195 , H03F3/211 , H03F3/4508 , H03F2200/294
Abstract: A communication unit includes a first input terminal to which a first transmission signal based on a first communication standard is input, a second input terminal to which a second transmission signal based on a second communication standard is input, a first transmission signal amplifier circuit outputting a first amplified transmission signal, or outputting a second amplified transmission signal, a first input-output terminal outputting the first amplified transmission signal or the second amplified transmission signal, and at least one of a first reception signal and a second reception signal inputted to the first input-output terminal, a first reception signal amplifier circuit performing at least one of operation of outputting a first amplified reception signal and operation of outputting a second amplified reception signal, a first output terminal outputting the first amplified reception signal, and a second output terminal outputting the second amplified reception signal.
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公开(公告)号：US09955435B2
公开(公告)日：2018-04-24
申请号：US15720188
申请日：2017-09-29
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.
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公开(公告)号：US09705451B2
公开(公告)日：2017-07-11
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.
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公开(公告)号：US09608572B2
公开(公告)日：2017-03-28
申请号：US14792902
申请日：2015-07-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro Takenaka
Abstract: A power amplifier includes a power splitter that splits a first signal into a second signal and a third signal delayed from the second signal by about 90°, a first amplifier that outputs a fourth signal by amplifying the second signal when a power level of the first signal equals/exceeds a first level, a second amplifier that outputs a fifth signal by amplifying the third signal when the power level of the first signal equals/exceeds a second level higher than the first level, a first phase shifter that receives the fourth signal and outputs a sixth signal delayed from the fourth signal by about 45°, a second phase shifter that receives the fifth signal and outputs a seventh signal advanced from the fifth signal by about 45°, and a combining unit that outputs an amplified signal of the first signal by combining the sixth and seventh signals.
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公开(公告)号：US09577580B2
公开(公告)日：2017-02-21
申请号：US15251012
申请日：2016-08-30
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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