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公开(公告)号：US20230013880A1
公开(公告)日：2023-01-19
申请号：US17813124
申请日：2022-07-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shohei IMAI
Abstract: A power amplifier circuit includes a first amplifier transistor, a first nonlinear element, and a current control circuit. The first amplifier transistor has a base or a gate into which a first signal is input, a collector or a drain from which a signal resulting from amplification of the first signal is output, and an emitter or a source that is grounded. The first nonlinear element is connected between the collector or the drain of the first amplifier transistor and the base or the gate of the first amplifier transistor. The current control circuit is connected between the ground and the base or the gate of the first amplifier transistor and controls current flowing through the first nonlinear element.
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公开(公告)号：US20250015765A1
公开(公告)日：2025-01-09
申请号：US18888758
申请日：2024-09-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shohei IMAI
Abstract: An impedance detection circuit includes: a first detector that detects a first voltage amplitude at an end of an inverter circuit having the end to which a radio frequency signal is input and having a different end from which a signal is output; a second detector that detects a second voltage amplitude of the different end of the inverter circuit; and a phase difference detector that detects a phase difference between a phase of a voltage across the end of the inverter circuit and a phase of a voltage across the different end of the inverter circuit. An absolute value of a product of diagonal elements of a dependent parameter for the inverter circuit is smaller than an absolute value of a product of off-diagonal elements.
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公开(公告)号：US20240348216A1
公开(公告)日：2024-10-17
申请号：US18633545
申请日：2024-04-12
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tomoya ODA , Tetsurou ASHIDA , Kouhei JITOUSHO , Shohei IMAI
CPC classification number: H03F3/245 , H03F1/0288 , H03F2200/451
Abstract: A radio frequency that includes a carrier amplifier and a peak amplifier, a 90° hybrid circuit connected to an input end of the carrier amplifier and an input end of the peak amplifier, a coupler connected to an output end of the carrier amplifier and an output end of the peak amplifier, and a control circuit configured to vary a threshold value of a bias voltage of the peak amplifier based on a radio frequency signal input to the 90° hybrid circuit or the carrier amplifier, and a signal indicating a drive level of the carrier amplifier, in which the carrier amplifier and the peak amplifier are included in an integrated circuit, the control circuit is included in an integrated circuit, and the integrated circuit and the integrated circuit are laminated.
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公开(公告)号：US20240162869A1
公开(公告)日：2024-05-16
申请号：US18417311
申请日：2024-01-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shohei IMAI , Satoshi TANAKA
CPC classification number: H03F3/245 , H03F1/0288 , H03F2200/451
Abstract: A power amplifier circuit includes: a variable power splitter circuit that splits a first signal into a second and a third signal, the third signal being out of phase with the second signal, and increases or decreases first power of the third signal in response to a control signal; a carrier circuit including carrier amplifiers, the carrier circuit amplifies the second signal and output the amplified second signal; a peaking circuit including one or more peaking amplifiers, the peaking circuit amplifies the third signal and outputs the amplified third signal; and a control circuit that outputs to the variable power splitter circuit the control signal based on a saturation level of a target carrier amplifier, the target carrier amplifier being a carrier amplifier positioned closest to the output among the one or more carrier amplifiers in the carrier circuit.
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公开(公告)号：US20240128934A1
公开(公告)日：2024-04-18
申请号：US18484660
申请日：2023-10-11
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shohei IMAI
IPC: H03F1/02
CPC classification number: H03F1/0288 , H03F1/0222 , H03F2200/451
Abstract: A Doherty amplifier circuit includes a carrier amplifier including one or more amplifiers, and a peaking amplifier including one or more amplifiers. At least one of the amplifiers includes a first transistor and a current draw circuit. The first transistor receives, at its base or gate, a first radio frequency signal, and outputs, from its emitter or source, a second radio frequency signal obtained by amplifying the first radio frequency signal. The current draw circuit draws, from the emitter or source of the first transistor, a current based on a control signal.
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Patent Agency Ranking
公开(公告)号：US20240113663A1
公开(公告)日：2024-04-04
申请号：US18476773
申请日：2023-09-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shohei IMAI
IPC: H03F1/02
CPC classification number: H03F1/0288 , H03F2200/102 , H03F2200/451
Abstract: A Doherty amplifier circuit includes a carrier amplifier including one or more amplifiers, and a peaking amplifier including one or more amplifiers. At least one of the amplifiers includes a transistor and a feedback circuit. The transistor receives, at its base or gate, a radio frequency signal and a bias voltage or current which changes, and outputs an amplified radio frequency signal from its collector or drain. The feedback circuit provides, to the base or gate or the emitter or source of the transistor, a voltage or a current based on the amplified radio frequency signal.
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公开(公告)号：US20230318546A1
公开(公告)日：2023-10-05
申请号：US18192802
申请日：2023-03-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuuki TANAKA , Shohei IMAI
CPC classification number: H03F3/211 , H03F1/0288 , H03F1/565 , H03F3/45475 , H03F2200/387 , H03F2200/451
Abstract: A combiner circuit includes: a combiner section that outputs a combined signal by combining a first signal output from a carrier amplifier circuit and a second signal output from a peak amplifier circuit, the first signal being generated by amplifying a first distribution signal distributed from an input signal, the second signal being generated by amplifying a second distribution signal distributed from the input signal; and a matching section connected in series with the combiner section to receive the combined signal, wherein a variation coefficient of an imaginary part of impedance associated with an increase in frequency of the input signal indicates a negative value, and the matching section matches impedance between the combiner section and a load.
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公开(公告)号：US20230216456A1
公开(公告)日：2023-07-06
申请号：US18174277
申请日：2023-02-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shohei IMAI , Satoshi TANAKA
Abstract: A power amplifier circuit includes a power splitter, a first amplifier, a second amplifier, a third amplifier, a fourth amplifier, a first bias circuit, a first line connecting the first bias circuit and the first amplifier, and a second line connecting the first bias circuit and the third amplifier on the same semiconductor substrate, in which the first line and the second line are formed such that a voltage drop amount of the first bias voltage between the first bias circuit and the first amplifier is substantially equal to a voltage drop amount of the first bias voltage between the first bias circuit and the third amplifier.
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公开(公告)号：US20230128900A1
公开(公告)日：2023-04-27
申请号：US18048065
申请日：2022-10-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shohei IMAI
Abstract: A first transistor having a base or a gate supplied with a high-frequency signal through a capacitor, and supplied with a bias current through a resistive element, a second transistor having a base or a gate connected to an emitter or a source of the first transistor, and a collector or a drain connected to an output terminal, and a third transistor having a collector or a drain connected to the base or the gate of the first transistor, and an emitter or a source connected to reference potential are provided, and the third transistor is provided such that a current flowing through the collector or the drain of the third transistor increases when a current flowing through the collector or the drain of the second transistor increases.
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公开(公告)号：US20210313938A1
公开(公告)日：2021-10-07
申请号：US17223384
申请日：2021-04-06
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi TANAKA , Yoshiaki SUKEMORI , Takeshi KOGURE , Shohei IMAI
Abstract: A power amplifier module includes a first amplifier, a power splitter, a second amplifier, a third amplifier, a phase shifter, a combining unit, and a controller. The first amplifier amplifies a first signal and outputs a second signal. The power splitter splits the second signal into a third signal and a fourth signal. The second amplifier amplifies the third signal and outputs a fifth signal. The third amplifier amplifies the fourth signal and outputs a sixth signal. The phase shifter receives the fifth signal and shifts a phase of the fifth signal. The combining unit combines the fifth signal having the phase shifted by the phase shifter and the sixth signal and outputs an amplified signal of the second signal. The controller outputs a first control signal for controlling a power level of the sixth signal output from the third amplifier.
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