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    Amplification circuit
    2.
    发明授权
    Amplification circuit 有权

    公开(公告)号：US12132449B2

    公开(公告)日：2024-10-29

    申请号：US17932395

    申请日：2022-09-15

    申请人： Murata Manufacturing Co., Ltd.

    发明人： Daisuke Watanabe

    IPC分类号： H03F3/04 ,  H03F1/02 ,  H03F1/22 ,  H03F3/193 ,  H03F3/24

    CPC分类号： H03F1/22 ,  H03F1/0205 ,  H03F3/193 ,  H03F3/245

    摘要： 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.

    Dual voltage switched branch LNA architecture
    7.
    发明授权
    Dual voltage switched branch LNA architecture 有权

    公开(公告)号：US12101065B2

    公开(公告)日：2024-09-24

    申请号：US18492544

    申请日：2023-10-23

    申请人： pSemi Corporation

    发明人： Miles Sanner ,  Emre Ayranci ,  Parvez Daruwalla

    IPC分类号： H03F1/22 ,  H03F3/193 ,  H03F3/21

    CPC分类号： H03F1/223 ,  H03F3/193 ,  H03F3/21 ,  H03F2200/294 ,  H03F2203/7236

    摘要： Methods and circuital arrangements for turning OFF branches of a multi-branch cascode amplifier are presented. First and second switching arrangements coupled to a branch allow turning OFF the branch while protecting transistors of the branch from a supply voltage that may be greater than a tolerable voltage of the transistors. The first switching arrangement includes a transistor-based switch that is in series connection with the transistors of the branch. The first switching arrangement drops the supply voltage during the OFF state of the branch and provides a conduction path for a current through the branch during the ON state of the branch. A resistor and a shunting switch are coupled to a gate of the transistor-based switch to reduce parasitic coupling effects of the transistor-based switch upon an RF signal coupled to the branch during the ON state and OFF state of the branch.

    Variable-gain amplifier and phased array system
    8.
    发明授权
    Variable-gain amplifier and phased array system 有权

    公开(公告)号：US12088268B2

    公开(公告)日：2024-09-10

    申请号：US17362885

    申请日：2021-06-29

    申请人： HUAWEI TECHNOLOGIES CO.,LTD.

    发明人： Yunchao Guan ,  Lei Lu

    IPC分类号： H03F3/217 ,  H03F3/193 ,  H03G3/30 ,  H04B1/04 ,  H04B1/16 ,  H04B1/40

    CPC分类号： H03G3/3036 ,  H03F3/193 ,  H03F2200/451 ,  H03G2201/103 ,  H03G2201/307 ,  H04B1/04 ,  H04B1/16 ,  H04B1/40

    摘要： A variable-gain amplifier and a phased array system are provided. A variable-gain amplifier includes a cascode circuit comprising a first amplification transistor and a second amplification transistor array that are cascaded, the second amplification transistor array comprising a plurality of second amplification transistors connected in parallel and configured to output an adjustable current to an output matching network, the first amplification transistor is a common-source transistor, the plurality of second amplification transistors are common-gate transistors, or the cascode circuit is a common-emitter common-base circuit, the first amplification transistor is a common-emitter amplification circuit, and the second amplification transistor array is a common-base amplification circuit. The variable-gain amplifier further including a variable capacitor circuit coupled to the second amplification transistor array and coupled to the output matching network at first nodes.