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公开(公告)号：US20210235392A1
公开(公告)日：2021-07-29
申请号：US17229412
申请日：2021-04-13
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi TANAKA , Kiichiro TAKENAKA , Takayuki TSUTSUI , Taizo YAMAWAKI , Shun IMAI
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：US20210175853A1
公开(公告)日：2021-06-10
申请号：US16953890
申请日：2020-11-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro TAKENAKA
Abstract: A power amplifier includes a 3-dB coupler which splits a first signal into a second signal and a third signal lagging behind the second signal by 90°, a carrier amplifier, a peak amplifier, and a hybrid coupler. The carrier amplifier amplifies the second signal and outputs a fourth signal when the first-signal power level is a first level or higher. The peak amplifier amplifies the third signal and outputs a fifth signal when the first-signal power level is a second level or higher, which is higher than the first level. The hybrid coupler includes a first transmission line receiving the fourth signal at its first terminal, and a second transmission line receiving the fifth signal at its first terminal and being open at its second terminal. The first transmission line outputs, from its second terminal, an amplified first signal obtained by combining the fourth and fifth signals.
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公开(公告)号：US20190356276A1
公开(公告)日：2019-11-21
申请号：US16527203
申请日：2019-07-31
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro TAKENAKA
Abstract: A power amplifier includes a distributor distributing an input first signal to a second signal and a third signal delayed by about 2ϕ degrees (45
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公开(公告)号：US20180358931A1
公开(公告)日：2018-12-13
申请号：US16104305
申请日：2018-08-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro TAKENAKA
CPC classification number: H03F1/0288 , H03F3/195 , H03F3/211 , H03F3/213 , H03F2200/297 , H03F2200/301 , H03F2200/309 , H03F2200/336 , H03F2200/387 , H03F2200/451 , H03F2203/21139 , H03F2203/21142 , H03F2203/21169
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：US20210050873A1
公开(公告)日：2021-02-18
申请号：US17088246
申请日：2020-11-03
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro TAKENAKA
Abstract: A transmission unit includes: a power amplification module that amplifies the power of an input signal and outputs an amplified signal; and a power supply module that supplies a power supply voltage to the power amplification module on the basis of a first control signal corresponding to the band width of the input signal. On the basis of the first control signal, the power supply module varies the power supply voltage in accordance with the amplitude level of the input signal in the case where the band width of the input signal is a first band width and varies the power supply voltage in accordance with the average output power of the power amplification module in the case where the band width of the input signal is a second band width that is larger than the first band width.
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Patent Agency Ranking
公开(公告)号：US20200343861A1
公开(公告)日：2020-10-29
申请号：US16854424
申请日：2020-04-21
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro TAKENAKA
Abstract: A power amplifier circuit includes a first amplifier including two amplifiers connected in series with a matching circuit interposed therebetween, a first power supply circuit that supplies a first power supply voltage to a former amplifier of the first amplifier, and a second power supply circuit that supplies a second power supply voltage to a latter amplifier of the first amplifier.
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公开(公告)号：US20200044673A1
公开(公告)日：2020-02-06
申请号：US16598515
申请日：2019-10-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro TAKENAKA
Abstract: A transmission unit includes: a power amplification module that amplifies the power of an input signal and outputs an amplified signal; and a power supply module that supplies a power supply voltage to the power amplification module on the basis of a first control signal corresponding to the band width of the input signal. On the basis of the first control signal, the power supply module varies the power supply voltage in accordance with the amplitude level of the input signal in the case where the band width of the input signal is a first band width and varies the power supply voltage in accordance with the average output power of the power amplification module in the case where the band width of the input signal is a second band width that is larger than the first band width.
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公开(公告)号：US20190253096A1
公开(公告)日：2019-08-15
申请号：US16267691
申请日：2019-02-05
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tsuyoshi SATO , Hidetoshi MATSUMOTO , Kiichiro TAKENAKA , Masahiro ITO , Satoshi TANAKA
CPC classification number: H04B1/40 , H04B1/0057 , H04B1/006 , H04B1/0067
Abstract: First to fourth circuits are connected to corresponding first to fourth antenna terminals. The first to fourth circuits transmit and receive a signal of TDD and a signal of FDD. The first to fourth circuits transmit and receive a signal of MIMO. The third circuit receives a signal of a satellite positioning system. The lower limit of the frequency of the signal received by the third circuit and the fourth circuit is higher than the lower limit of the frequency of the signal received by the first circuit and the second circuit.
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公开(公告)号：US20170085279A1
公开(公告)日：2017-03-23
申请号：US15366355
申请日：2016-12-01
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Hidenori OBIYA , Shinya HITOMI , Kiichiro TAKENAKA , Masahiro ITO , Satoshi ARAYASHIKI
CPC classification number: H04B1/04 , H04B1/525 , H04L27/2089 , H04L27/2691 , H04L27/364 , H04L27/367 , H04L2027/0018
Abstract: A transmission circuit includes a transmission signal generation unit, a control unit, and a transmission signal amplification unit. The transmission signal generation unit generates a transmission signal that has been modulated. The transmission signal amplification unit includes a power amplifier that amplifies the transmission signal. The control unit determines a supply voltage signal having an amplitude characteristic of a period identical to that of an envelope of the transmission signal and supplies the supply voltage signal to the power amplifier. The control unit determines an output timing of the supply voltage signal such that a phase difference between a phase of the envelope of the transmission signal and a phase of the supply voltage signal does not become zero.
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公开(公告)号：US20240339969A1
公开(公告)日：2024-10-10
申请号：US18750079
申请日：2024-06-21
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kiichiro TAKENAKA
CPC classification number: H03F3/211 , H03F1/56 , H03F3/213 , H03F2200/387 , H03F2200/451
Abstract: A power amplifier circuit includes: a first power splitter that splits an input signal into a first input signal and a second input signal; an amplifier circuit that includes a pair of amplifiers electrically connected in parallel and that amplifies the first input signal and outputs an output signal to an output terminal; a control amplifier that amplifies the second input signal and outputs, to the amplifier circuit, a control signal for controlling load impedance of the amplifier circuit; and a first impedance matching unit that is electrically connected in series between the amplifier circuit and the control amplifier and includes a transmission line transformer.
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