-
公开(公告)号：US20250023588A1
公开(公告)日：2025-01-16
申请号：US18900951
申请日：2024-09-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Kae YAMAMOTO
Abstract: A high frequency circuit includes power amplifiers, filters including a band A in their pass bands, filters including a band B in their pass bands, and a switch circuit that switches the connection between an antenna terminal and two terminals and switches the connection between another antenna terminal and two other terminals. The output end of one power amplifier is connected to the input ends of two of the filters, the output end of one filter is connected to one of the terminals, the output end of another filter is connected to another terminal, the output end of the other power amplifier is connected to the input ends of two others of the filters, the output end of one of the other filters is connected to one of the other terminals, and the output end of another of the other filters is connected to another of the other terminals.
-
公开(公告)号：US20240097629A1
公开(公告)日：2024-03-21
申请号：US18509464
申请日：2023-11-15
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Yoshiaki SUKEMORI , Kae YAMAMOTO , Ryo WAKABAYASHI
CPC classification number: H03F3/245 , H03F1/0288 , H04B1/04 , H03F2200/451
Abstract: A radio-frequency module includes a module substrate, a carrier amplifier and a peak amplifier, a transformer, and a phase adjustment circuit. The carrier amplifier and the peak amplifier are included in a semiconductor IC. One end of an input-side coil is connected to an output terminal of the carrier amplifier. One end of the output-side coil is connected to a signal output terminal.
-
公开(公告)号：US20240405732A1
公开(公告)日：2024-12-05
申请号：US18804088
申请日：2024-08-14
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Kae YAMAMOTO
Abstract: A high frequency circuit includes a signal input terminal and a signal output terminal; a first amplifier, a second amplifier, a third amplifier, and a fourth amplifier; and a first phase shift circuit. An input terminal of the fourth amplifier is connected to the signal input terminal, an output terminal of the fourth amplifier is connected to an input terminal of the first amplifier and an input terminal of the second amplifier, an output terminal of the second amplifier is connected to an input terminal of the third amplifier, an output terminal of the third amplifier is connected to one end of the first phase shift circuit, and the other end of the first phase shift circuit is connected to an output terminal of the first amplifier.
-
公开(公告)号：US20240146259A1
公开(公告)日：2024-05-02
申请号：US18408627
申请日：2024-01-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Kae YAMAMOTO
IPC: H03F3/24
CPC classification number: H03F3/245 , H03F2200/451
Abstract: A power amplifier circuit includes a power amplifier and an external power terminal that receives a power supply voltage from a power supply circuit. The power amplifier includes two amplifying elements and, a limiter, and an RC circuit. The amplifying elements respectively include first and second input terminals, first and second output terminals, and first and second power terminals. The limiter restricts the power supply voltage to a predetermined range and outputs the restricted power supply voltage. The RC circuit is connected in parallel with the limiter. The first input terminal is connected to an external input terminal. The first output terminal is connected to the second input terminal. The second output terminal is connected to an external output terminal. The first power terminal is connected to the external power terminal via the limiter. The second power terminal is connected to the external power terminal.
-
公开(公告)号：US20240146258A1
公开(公告)日：2024-05-02
申请号：US18407467
申请日：2024-01-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Shigeru TSUCHIDA , Kae YAMAMOTO
CPC classification number: H03F3/245 , H03F1/565 , H03F3/195 , H03F3/72 , H03F2200/423 , H03F2200/451 , H03F2200/537 , H03F2203/7206
Abstract: A power amplifier circuit that includes an external input terminal and an external output terminal; a first power amplifier, a second power amplifier, a third power amplifier, and a fourth power amplifier; a transformer including an input-side coil and an output-side coil; and a first transmission line, the external input terminal being connected to an input terminal of the first and second power amplifiers, an output terminal of the first power amplifier is connected to an input terminal of the third and fourth power amplifiers, output terminals of the third and fourth power amplifiers being connected to a first and second end of the input-side coil respectively, the external output terminal being connected to a first end of the output-side coil, and an output terminal of the second power amplifier being connected to a second end of the output-side coil via the first transmission line.
-
Patent Agency Ranking
公开(公告)号：US20240088841A1
公开(公告)日：2024-03-14
申请号：US18518615
申请日：2023-11-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Yoshiaki SUKEMORI , Kae YAMAMOTO , Ryo WAKABAYASHI , Isao TAKENAKA
CPC classification number: H03F3/19 , H03F1/565 , H04B1/40 , H03F2200/387 , H03F2200/451
Abstract: A radio frequency circuit includes carrier amplifiers and peak amplifiers, transformers, a signal output terminal connected to a first end of an output-side coil, an LC series circuit, and a capacitor. An input-side coil is connected, at its first end, to the carrier amplifier, and is connected, at its second end, to the carrier amplifier. An input-side coil is connected, at its first end, to the peak amplifier, and is connected, at its second end, to the peak amplifier. The LC series circuit is connected between the peak amplifier and the ground. The capacitor is connected to a second end of the output-side coil and a first end of an output-side coil. The output-side coil is connected, at its second end, to the ground.
-
公开(公告)号：US20240405735A1
公开(公告)日：2024-12-05
申请号：US18807034
申请日：2024-08-16
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Kae YAMAMOTO
Abstract: A radio-frequency circuit includes a carrier amplifier configured to amplify radio-frequency signals in a band A, a carrier amplifier configured to amplify radio-frequency signals in a band B, peak amplifiers configured to amplify radio-frequency signals in the band A and radio-frequency signals in the band B, a transformer having an input-side coil and an output-side coil, and phase shift lines.
-
公开(公告)号：US20240178804A1
公开(公告)日：2024-05-30
申请号：US18434907
申请日：2024-02-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Ryo WAKABAYASHI , Kae YAMAMOTO
IPC: H03F3/24
CPC classification number: H03F3/245 , H03F2200/315 , H03F2200/451
Abstract: The power amplifier circuit includes an amplifier element, a transmission line transformer (TLT) circuit including a first, second and third line, and a switching circuit including a first, second, and third terminal. One end of the first line is coupled to an output terminal of the amplifier element, and the other end of the first line is coupled to one end of the second line. The other end of the second line is coupled to the terminal. One end of the third line is coupled between the one end of the first line and the output terminal of the amplifier element. The other end of the third line is coupled to the terminal. The switching circuit includes a first switch provided between the terminal and ground and a second switch provided between the terminal and ground.
-
公开(公告)号：US20240162923A1
公开(公告)日：2024-05-16
申请号：US18418379
申请日：2024-01-22
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Hiroki SHOUNAI , Kae YAMAMOTO , Ryo WAKABAYASHI
CPC classification number: H04B1/0458 , H04B1/0078 , H04B2001/0408
Abstract: A radio frequency circuit includes power amplifiers, a transformer, a filter having a band A as a pass band, a filter having a band B as a pass band, a filter having a band C as a pass band, matching circuits connected to one end of an output side coil, and matching circuits connected to the other end of the output side coil. The matching circuit includes a capacitor disposed at a first path, a switch connected to the first path and a ground, a switch and an inductor connected in series, and the matching circuit includes a capacitor disposed at a second path, and a switch and an inductor connected in series, and the matching circuit includes a switch connected to a third path and the ground.
-
公开(公告)号：US20240128936A1
公开(公告)日：2024-04-18
申请号：US18394165
申请日：2023-12-22
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji TAHARA , Ryo WAKABAYASHI , Kae YAMAMOTO
CPC classification number: H03F1/302 , H03F1/0222 , H03F3/195 , H03F3/245 , H03F2200/102 , H03F2200/451
Abstract: A power amplifier circuit includes an amplifier transistor having a collector terminal, an emitter terminal, and a base terminal, bias circuits, and a current limiter circuit. The bias circuit includes a constant current amplifier transistor that supplies direct-current bias current from an emitter terminal to the base terminal. The current limiter circuit includes a current limiting transistor an emitter terminal of which is connected to the bias circuit, a resistive element connected between the current limiting transistor and a power supply terminal, and a resistive element connected between the current limiting transistor and the constant current amplifier transistor. The bias circuit includes a constant current amplifier transistor that supplies direct-current bias current i3 from an emitter terminal to the base terminal.
-
-
-
-
-
-
-
-
-
Search Results
22
records
(took 0.019 seconds)
