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公开(公告)号：US20240421775A1
公开(公告)日：2024-12-19
申请号：US18818671
申请日：2024-08-29
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Kae YAMAMOTO
Abstract: A Doherty amplification circuit includes a carrier amplifier, a peak amplifier, a phase shift circuit, a phase shift circuit connected to an output end of the peak amplifier, a transformer including an input terminal connected to an output end of the carrier amplifier, and output terminals, and a transformer including input terminals, which are respectively connected to the output terminals of the transformer, and an output terminal connected to an antenna connection terminal, in which the phase shift circuit is connected between the output terminal of the transformer and the input terminal of the transformer, and the peak amplifier and the phase shift circuit are connected between the output terminal of the transformer and the input terminal of the transformer.
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12.发明公开公开(公告)号：US20240178868A1
公开(公告)日：2024-05-30
申请号：US18432115
申请日：2024-02-05
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Hidetaka TAKAHASHI , Kae YAMAMOTO
CPC classification number: H04B1/04 , H03F3/24 , H03F3/68 , H04B2001/0408
Abstract: A radio frequency circuit including power amplifiers, a transformer having an input-side coil and an output-side coil, a bias circuit connected to the power amplifiers, an output terminal connected to one end of the output-side coil, an output terminal connected to another end of the output-side coil, a switch connected between the output terminal and a ground, a switch connected between the output terminal and a ground, a phase shift line having an input end connected to an output terminal of the power amplifier and an output end connected to one end of the input-side coil, and a phase shift line having an input end connected to an output terminal of the power amplifier and an output end connected to another end of the input-side coil.
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公开(公告)号：US20240171140A1
公开(公告)日：2024-05-23
申请号：US18420805
申请日：2024-01-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Kensuke TAKIMOTO , Kae YAMAMOTO
CPC classification number: H03F3/245 , H03F1/0216 , H04B1/0475 , H03F2200/294 , H03F2200/451 , H03F2200/541 , H04B2001/0416
Abstract: A power amplifier circuit that includes a carrier amplifier, peaking amplifiers, an input coil, an output coil, an input coil, an output coil, an output terminal to which one end of the output coil is connected, and ¼-wavelength transmission lines. The carrier amplifier is connected to one end of the input coil. The peaking amplifier is connected to one end of the ¼-wavelength transmission line. The peaking amplifier is connected to one end of the input coil. The peaking amplifier is connected to one end of the ¼-wavelength transmission line. The other end of the ¼-wavelength transmission line is connected to the other end of the input coil. The other end of the ¼-wavelength transmission line is connected to the other end of the input coil. One end of the output coil is connected to the other end of the output coil.
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公开(公告)号：US20240128932A1
公开(公告)日：2024-04-18
申请号：US18395786
申请日：2023-12-26
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Yoshiaki SUKEMORI , Kae YAMAMOTO , Ryo WAKABAYASHI
CPC classification number: H03F1/0222 , H03F3/195 , H03F3/245 , H03F3/72 , H03F2200/102 , H03F2200/423 , H03F2200/451 , H03F2203/7215
Abstract: A power amplifier circuit includes external input and output terminals; a first power amplifier with first input and output terminals, the first input terminal being connected to the external input terminal, the first output terminal being connected to the external output terminal; a second power amplifier having second input and output terminals, the second input terminal being connected to the external input terminal, the second output terminal being connected to the external output terminal; a power supply terminal that receives a power supply voltage that is supplied to the first power amplifier and controllably supplied to the second power amplifier; and a switch having first and second terminals, the first terminal being connected to the power supply terminal, the second terminal being connected to the second power amplifier.
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公开(公告)号：US20240113662A1
公开(公告)日：2024-04-04
申请号：US18471337
申请日：2023-09-21
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Kae YAMAMOTO
CPC classification number: H03F1/0288 , H03F1/56 , H03F3/245 , H03F3/604
Abstract: An amplifier module includes an antenna that includes four power feed points, and four power amplifiers. Output ends of the four power amplifiers are connected to the four power feed points in a one-to-one relationship. The four power feed points are arranged rotationally symmetrically around a center of the antenna when a main surface of the antenna is viewed in plan.
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Patent Agency Ranking
公开(公告)号：US20250047250A1
公开(公告)日：2025-02-06
申请号：US18922573
申请日：2024-10-22
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Ryo WAKABAYASHI , Kae YAMAMOTO , Toshiki MATSUI
Abstract: A radio frequency circuit that includes a carrier amplifier, a transmission line transformer having a main line and a sub line, a signal output terminal, a voltage supply terminal and a capacitor, wherein the main line has one end connected to an output end of a peak amplifier, the main line has another end connected to the signal output terminal, the sub line has one end connected to the one end of the main line, the sub line has another end connected to the voltage supply terminal, and the peak amplifier has the output end connected to the voltage supply terminal with the capacitor interposed therebetween.
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公开(公告)号：US20240429871A1
公开(公告)日：2024-12-26
申请号：US18823707
申请日：2024-09-04
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Yuuki NAKANO , Kae YAMAMOTO
Abstract: A high-frequency module is disclosed, comprising a carrier amplifier, peak amplifiers, a transformer, a phase-shifting line, and bias circuits, all integrated into a semiconductor IC. The input terminals of the semiconductor IC are connected to the input ends of both the carrier and peak amplifiers, while the output terminals are connected to their respective output ends. The transformer has one end connected to the output terminal, with the other end connected to the output terminal via the phase-shifting line. Additionally, the bias circuits are connected to the carrier amplifier and the peak amplifiers to regulate their operation.
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公开(公告)号：US20240305247A1
公开(公告)日：2024-09-12
申请号：US18666857
申请日：2024-05-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Takeshi KOGURE , Kae YAMAMOTO
CPC classification number: H03F1/0288 , H03F3/245 , H03F2200/451
Abstract: A power amplifier circuit includes a carrier amplifier, a peak amplifier, an external output terminal, a combiner that includes an input terminal connected to an output terminal of the power amplifier, an input terminal connected to an output terminal of the power amplifier, and an output terminal connected to the external output terminal, a bias circuit that supplies a DC bias current to the carrier amplifier, a bias circuit that supplies a DC bias current to the peak amplifier, and a current limit circuit that is connected between the power amplifier and the bias circuit and that is configured to change a magnitude of the DC bias current according to a magnitude of a power supply voltage applied to the power amplifier circuit.
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公开(公告)号：US20240204739A1
公开(公告)日：2024-06-20
申请号：US18589440
申请日：2024-02-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Ryo WAKABAYASHI , Kae YAMAMOTO
CPC classification number: H03F3/245 , H03F1/0288 , H03F2200/451
Abstract: A radio frequency circuit includes a carrier amplifier, a peaking amplifier, an input-side coil, an output-side coil, harmonic reduction circuits, and a phase shift line. One end of the input-side coil is connected to the carrier amplifier, and the other end thereof is connected to the peaking amplifier. In the harmonic reduction circuit, an inductor and a capacitor that are connected in series are disposed in series on a path connecting the carrier amplifier and the ground. The harmonic reduction circuit has an inductor and a capacitor that are connected in series and an inductor connected in parallel to the capacitor. The inductor and the capacitor are disposed in series on a path connecting the peaking amplifier and the ground.
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公开(公告)号：US20240162860A1
公开(公告)日：2024-05-16
申请号：US18408591
申请日：2024-01-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Kae YAMAMOTO
CPC classification number: H03F1/0233 , H03F3/245 , H03F2200/105 , H03F2200/451
Abstract: A power amplifier circuit includes an external input terminal, an external output terminal, a power amplifier connected to the external input terminal, power amplifiers, a power supply terminal connected to the power amplifier, and a power supply terminal connected to the power amplifier. The power amplifiers are connected in parallel with each other between the power amplifier and the external output terminal. A first power supply voltage which is variable to multiple discrete first voltage levels is supplied to the power amplifier via the power supply terminal. A second power supply voltage which is variable to multiple discrete second voltage levels is supplied to the power amplifier via the power supply terminal. The multiple discrete second voltage levels are different from the multiple discrete first voltage levels.
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