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公开(公告)号：US11856525B2
公开(公告)日：2023-12-26
申请号：US18142469
申请日：2023-05-02
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Kiichiro Takenaka , Takayuki Tsutsui , Taizo Yamawaki , Shun Imai
IPC: H04W52/24 , H03F3/19 , H03F1/02 , H03F3/21 , H03F3/189 , H04W52/02 , H03F3/24 , H04B1/04 , H04W88/06
CPC classification number: H04W52/246 , H03F1/0216 , H03F1/0227 , H03F1/0277 , H03F3/189 , H03F3/19 , H03F3/21 , H03F3/24 , H04B1/0475 , H04W52/0251 , H04W52/0261 , H03F2200/102 , H03F2200/294 , H03F2200/504 , H04W88/06 , Y02D30/70
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：US11528012B2
公开(公告)日：2022-12-13
申请号：US17089766
申请日：2020-11-05
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takayuki Tsutsui , Satoshi Tanaka , Kiichiro Takenaka , Masatoshi Hase
Abstract: An active balun circuit includes first and second transistors having emitters electrically coupled to each other and configured to output differential signals and a circuit element coupled between the connection point of the emitter of the first transistor and the emitter of the second transistor and a reference potential. The impedance of the circuit element at a particular frequency of the input signal appears significantly larger than impedances at other frequencies. An input signal from an input terminal is inputted to the base of the first transistor. The reference potential is applied to the base of the second transistor. A supply voltage is applied to the collector of the first transistor and the collector of the second transistor. A signal from the collector of the first transistor and a signal from the collector of the second transistor are outputted as the differential signals.
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公开(公告)号：US11496100B2
公开(公告)日：2022-11-08
申请号：US17011766
申请日：2020-09-03
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：US10855318B2
公开(公告)日：2020-12-01
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：US10547276B2
公开(公告)日：2020-01-28
申请号：US16111797
申请日：2018-08-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masahiro Ito , Tsuyoshi Sato , Kiichiro Takenaka , Hidetoshi Matsumoto
Abstract: A power amplifier circuit includes a Doherty amplifier including a divider that divides a first signal into a second signal and a third signal, a carrier amplifier that amplifies the second signal and outputs a fourth signal, a peak amplifier that amplifies the third signal and outputs a fifth signal, a combiner that combines the fourth signal and the fifth signal and outputs an amplified signal of the first signal, a first bias circuit that supplies a first bias current or voltage to the carrier amplifier, and a second bias circuit that supplies a second bias current or voltage corresponding to a control signal to the peak amplifier; and a control circuit that supplies the control signal corresponding to a level of the second signal to the second bias circuit. The control circuit includes a detecting unit, an output unit, and a filter circuit.
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Patent Agency Ranking
公开(公告)号：US10439560B2
公开(公告)日：2019-10-08
申请号：US15867065
申请日：2018-01-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tsuyoshi Sato , Kiichiro Takenaka
Abstract: Provided is a power amplification module that includes: a first power amplifier that amplifies a first signal and outputs a second signal; and a first noise removing circuit that is inputted with a first voltage supplied from a DC-DC converter, removes noise from the first voltage in order to generate a second voltage, and outputs the second voltage as a power supply voltage of the first power amplifier.
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公开(公告)号：US10411653B2
公开(公告)日：2019-09-10
申请号：US15817524
申请日：2017-11-20
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：US10212671B2
公开(公告)日：2019-02-19
申请号：US15924861
申请日：2018-03-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Kiichiro Takenaka , Takayuki Tsutsui , Taizo Yamawaki , Shun Imai
IPC: H04W52/24 , H03F3/189 , H03F3/24 , H04B1/04 , H03F1/02 , H04W52/02 , H03F3/19 , H03F3/21 , H04W88/06
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：US20180287565A1
公开(公告)日：2018-10-04
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: H03F1/02 , H03G3/00 , H03F3/19 , H03F1/32 , H03F1/52 , H03F1/56 , H03F3/21 , H03F3/04 , H03F1/42
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.
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公开(公告)号：US09899963B2
公开(公告)日：2018-02-20
申请号：US15079960
申请日：2016-03-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tsuyoshi Sato , Kiichiro Takenaka
CPC classification number: H03F1/26 , H03F1/0222 , H03F1/0227 , H03F3/19 , H03F3/245 , H03F3/68 , H03F2200/102 , H03F2200/105 , H03F2200/451
Abstract: Provided is a power amplification module that includes: a first power amplifier that amplifies a first signal and outputs a second signal; and a first noise removing circuit that is inputted with a first voltage supplied from a DC-DC converter, removes noise from the first voltage in order to generate a second voltage, and outputs the second voltage as a power supply voltage of the first power amplifier.
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