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公开(公告)号：US20210273613A1
公开(公告)日：2021-09-02
申请号：US17325350
申请日：2021-05-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Daisuke WATANABE
Abstract: An amplification circuit includes: a power supply terminal that is connected to a power supply; a first transistor that has a first source terminal, a first drain terminal, and a first gate terminal to which a high-frequency signal is inputted; a second transistor that has a second source terminal that is connected to the first drain terminal, a second drain terminal that outputs a high frequency signal, and a second gate terminal that is grounded; a capacitor that is serially arranged on a second path that connects the second gate terminal and the power supply terminal; and a switch that is serially arranged on a first path, which connects the second drain terminal and the power supply terminal, or the second path. The second drain terminal and the second gate terminal are connected to each other via the switch and the capacitor.
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公开(公告)号：US20210159887A1
公开(公告)日：2021-05-27
申请号：US17167482
申请日：2021-02-04
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takayuki TOMITA , Daisuke WATANABE
Abstract: A switch module includes a first terminal, first and second filters, and first and second switches. Impedance of the first filter for a signal in a stop band is capacitive. When the first switch is turned OFF, impedance of the first switch is capacitive, and impedance of the first filter seen from an end portion of the first switch connected to the first filter is not in a short state and impedance of the first filter seen from the first terminal is in an open state.
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公开(公告)号：US20200220568A1
公开(公告)日：2020-07-09
申请号：US16818410
申请日：2020-03-13
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Daisuke WATANABE
Abstract: A high frequency circuit (4) includes a first terminal (40a), a second terminal (51a), a third terminal (51b), a first path, a second path, a first matching element (41) and a first amplifier (50a) both arranged in the first path, a first switch (42) connected between a reference terminal and a part of the first path, the part spanning between the first matching element and the first amplifier, a second matching element (43) and a second amplifier (50b) both arranged in the second path, and a second switch (44) connected between the reference terminal and a part of the second path, the part spanning between the second matching element and the second amplifier.
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公开(公告)号：US20190386618A1
公开(公告)日：2019-12-19
申请号：US16554887
申请日：2019-08-29
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Daisuke WATANABE , Takayuki TOMITA
Abstract: An amplification circuit includes a filter circuit, an amplifier, a capacitor, a bypass line, and a switch circuit that includes a first FET and a second FET connected in series between one end and the other end of the bypass line, a first resistance element connected in series to a gate of the first FET, and a second resistance element connected in series to a gate of the second FET. A first control signal is supplied to the gate of the first FET. A second control signal is supplied to the gate of the second FET. A product of a gate length and a gate width of the first FET and a resistance value of the first resistance element is smaller than a product of a gate length and a gate width of the second FET and a resistance value of the second resistance element.
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Patent Agency Ranking
公开(公告)号：US20190103855A1
公开(公告)日：2019-04-04
申请号：US16208734
申请日：2018-12-04
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takayuki TOMITA , Daisuke WATANABE
Abstract: A switch module includes a first terminal, first and second filters, and first and second switches. Impedance of the first filter for a signal in a stop band is capacitive. When the first switch is turned OFF, impedance of the first switch is capacitive, and impedance of the first filter seen from an end portion of the first switch connected to the first filter is not in a short state and impedance of the first filter seen from the first terminal is in an open state.
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公开(公告)号：US20250062724A1
公开(公告)日：2025-02-20
申请号：US18934518
申请日：2024-11-01
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Naoki MORIKAWA , Daisuke WATANABE
Abstract: An amplifier circuit includes a low-noise amplifier configured to amplify a radio-frequency signal, a switching circuit coupled between the low-noise amplifier and an antenna connection terminal, and a bias circuit configured to supply a direct-current bias voltage to the low-noise amplifier 11. The switching circuit includes a terminal coupled to the low-noise amplifier and a terminal coupled to the antenna connection terminal, and a transistor including a gate terminal and a p-type first substrate, configured to alternate the connection and disconnection between the terminals and in response to a voltage applied to the gate terminal. The bias circuit, the terminal, and the first substrate are coupled for direct-current conduction.
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公开(公告)号：US20230006609A1
公开(公告)日：2023-01-05
申请号：US17932395
申请日：2022-09-15
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Daisuke WATANABE
Abstract: An amplification circuit includes: a power supply terminal that is connected to a power supply; a transistor that has a source terminal, a drain terminal, and a gate terminal to which a high-frequency signal is input; a transistor that has a source terminal that is connected to the drain terminal, a drain terminal that outputs a high-frequency signal, and a gate terminal that is grounded; a capacitor that is serially disposed on a second path that connects the gate terminal and the power supply terminal to each other; and a switch that is serially disposed on a first path or the second path. The drain terminal and the gate terminal are connected to each other via the switch and the capacitor.
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公开(公告)号：US20170331458A1
公开(公告)日：2017-11-16
申请号：US15493205
申请日：2017-04-21
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takayuki TOMITA , Daisuke WATANABE
CPC classification number: H03H9/725 , H03H7/40 , H03H9/0009 , H03H9/64
Abstract: A switch module includes a first terminal, first and second filters, and first and second switches. Impedance of the first filter for a signal in a stop band is capacitive. When the first switch is turned OFF, impedance of the first switch is capacitive, and impedance of the first filter seen from an end portion of the first switch connected to the first filter is not in a short state and impedance of the first filter seen from the first terminal is in an open state.
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公开(公告)号：US20230327608A1
公开(公告)日：2023-10-12
申请号：US18332994
申请日：2023-06-12
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Daisuke WATANABE
CPC classification number: H03F1/26 , H03F3/68 , H03F3/72 , H03F2200/451 , H03F1/56 , H03F2200/294 , H03F3/245
Abstract: An amplifier circuit includes an amplifier including a common drain or a common collector having variable transconductance, a power distributor connected to an output side of the amplifier, and a switch arranged in series on a bypass path, which branches from a path with which the amplifier is connected to the power distributor, bypasses the power distributor, and is joined to an output of the power distributor. Input impedance (Zin) of the power distributor has a value different from that of output impedance (Zout1) of the power distributor.
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