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26 条记录 (耗时 0.027 秒)

    Bias circuit and bias supply method for a multistage power amplifier
    1.
    发明授权
    Bias circuit and bias supply method for a multistage power amplifier 失效
    用于多级功率放大器的偏置电路和偏置电源

    公开(公告)号：US06236266B1

    公开(公告)日：2001-05-22

    申请号：US09444406

    申请日：1999-11-22

    申请人： Kenichiro Choumei ,  Kazutomi Mori ,  Akira Inoue ,  Toshio Okuda

    发明人： Kenichiro Choumei ,  Kazutomi Mori ,  Akira Inoue ,  Toshio Okuda

    IPC分类号： H03G516

    CPC分类号： H03F1/302 ,  H03F3/19 ,  H03F3/72

    摘要： A bias circuit and bias supply method for a multistage power amplifier including heterojunction bipolar transistors for power amplifying a high frequency signal and suppressing an increase in Rx noise during low power output operation of the multistage power amplifier. The bias circuit outputs a control signal Vapc from an external control circuit to the base of only a first-stage amplifier HBT in the multistage power amplifier. To the base of the second and each later power amplifying stage HBT of the multistage power amplifier, the bias circuit supplies a bias current regulated by voltage stabilizers according to the control signal Vapc.

    摘要翻译： 一种用于多级功率放大器的偏置电路和偏置电源方法，包括用于功率放大高频信号的异质结双极晶体管，并抑制多级功率放大器的低功率输出操作期间的Rx噪声的增加。 偏置电路将控制信号Vapc从外部控制电路输出到仅在多级功率放大器中的第一级放大器HBT的基极。 对于多级功率放大器的第二和每个后续功率放大级HBT的基极，偏置电路根据控制信号Vapc提供由电压稳定器调节的偏置电流。

    Multiport amplifier and wireless device using the same
    9.
    发明授权
    Multiport amplifier and wireless device using the same 有权
    多端口放大器和无线设备使用相同

    公开(公告)号：US08618878B2

    公开(公告)日：2013-12-31

    申请号：US13142542

    申请日：2009-10-01

    申请人： Masatake Hangai ,  Kazutomi Mori ,  Kenichi Tajima ,  Yukihiro Tahara ,  Morishige Hieda

    发明人： Masatake Hangai ,  Kazutomi Mori ,  Kenichi Tajima ,  Yukihiro Tahara ,  Morishige Hieda

    IPC分类号： H03F3/68

    CPC分类号： H03F3/68 ,  H03F3/24 ,  H03F3/602 ,  H03F2200/204

    摘要： A multiport amplifier and a wireless device using the same are obtained in which isolation among output terminals is improved, whereby the quality of communication is improved. The multiport amplifier includes an input hybrid, an output hybrid, a plurality of amplifiers and a plurality of gain and phase control circuits that are inserted between the input hybrid and the output hybrid, a plurality of output coupling circuits that are inserted between the output hybrid and a plurality of output terminals so that they receive output extraction signals corresponding to a plurality of output signals, and a feedback circuit including a frequency selection circuit that is inserted between the plurality of output coupling circuits and the plurality of gain and phase control circuits.

    摘要翻译： 获得多端口放大器和使用该多端口放大器的无线装置，其中提高了输出端子之间的隔离，从而提高了通信质量。 多端口放大器包括插入在输入混合电路和输出混合电路之间的输入混合电路，输出混合电路，多个放大器和多个增益和相位控制电路，多个输出耦合电路插入在输出混合 以及多个输出端子，使得它们接收对应于多个输出信号的输出提取信号，以及包括插入在多个输出耦合电路和多个增益和相位控制电路之间的频率选择电路的反馈电路。

    Phase shifter and multibit phase shifter
    10.
    发明授权
    Phase shifter and multibit phase shifter 失效
    移相器和多位移相器

    公开(公告)号：US06674341B2

    公开(公告)日：2004-01-06

    申请号：US10220150

    申请日：2002-08-27

    申请人： Morishige Hieda ,  Kenichi Miyaguchi ,  Kazutomi Mori ,  Michiaki Kasahara ,  Tadashi Takagi ,  Hiroshi Ikematsu ,  Norio Takeuchi ,  Hiromasa Nakaguro ,  Kazuyoshi Inami

    发明人： Morishige Hieda ,  Kenichi Miyaguchi ,  Kazutomi Mori ,  Michiaki Kasahara ,  Tadashi Takagi ,  Hiroshi Ikematsu ,  Norio Takeuchi ,  Hiromasa Nakaguro ,  Kazuyoshi Inami

    IPC分类号： H01P118

    CPC分类号： H03H11/18 ,  H03H11/20

    摘要： A miniaturized phase shifter and a multi-bit phase shifter are provided, in which filters are constructed using capacitors at FET pinch-off and pass phase can be shifted by turning the FET on and off, the phase shifter including: a first FET having a drain electrode connected to an input terminal and a source electrode connected to an output terminal; a second FET, in which one of a drain electrode and a source electrode thereof is connected to the source electrode of the first FET and the other is connected to ground via a first inductor; and a third FET, in which one of a drain electrode and a source electrode thereof is connected to the drain electrode of the first FET and the other is connected to ground via a second inductor.

    摘要翻译： 提供了一种小型化移相器和多位移相器，其中使用FET夹断电容器构建滤波器，并且可以通过打开和关闭FET来移动通过相位，该移相器包括：第一FET，具有 漏极连接到输入端子，源电极连接到输出端子; 第二FET，其漏极电极和源电极中的一个连接到第一FET的源电极，另一个通过第一电感器连接到地; 以及第三FET，其中漏电极和源电极中的一个连接到第一FET的漏电极，另一个通过第二电感器连接到地。