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    Electrically controllable impedance matching device for use in RF amplifier
    7.
    发明授权
    Electrically controllable impedance matching device for use in RF amplifier 失效
    用于射频放大器的电可控阻抗匹配装置

    公开(公告)号：US6020795A

    公开(公告)日：2000-02-01

    申请号：US81326

    申请日：1998-05-19

    申请人： Sung-Uk Kim

    发明人： Sung-Uk Kim

    IPC分类号： H03J3/20 ,  H01P5/04 ,  H01P5/00

    CPC分类号： H03F1/56 ,  H01P5/04

    摘要： An electrically controllable impedance matching device for matching an impedance of a signal output from a signal generator in an RF (Radio Frequency) amplifier. The impedance matching device includes a 3-dB directional coupler having a coupling terminal, a through terminal, an isolation terminal being an output terminal, and an input terminal connected to the signal generator; a first phase shifter connected to the coupling terminal, for shifting a phase of the signal according to a control signal; a second phase shifter connected to the through terminal, for shifting the phase of the signal according to the control signal; and controller for generating the control signal. Each of the phase shifters includes a 3-dB directional coupler having a coupling terminal, a through terminal, an isolation terminal being an output terminal, and an input terminal; a first varactor diode connected between the coupling terminal and a ground terminal, of which capacitance is variable according to the control signal; and a second varactor diode connected between the through terminal and a ground terminal, of which capacitance is variable according to the control signal.

    摘要翻译： 一种用于匹配RF（射频）放大器中从信号发生器输出的信号的阻抗的电可控阻抗匹配装置。 阻抗匹配装置包括具有耦合端子的3-dB定向耦合器，直通端子，作为输出端子的隔离端子和连接到信号发生器的输入端子; 连接到所述耦合端子的第一移相器，用于根据控制信号移位所述信号的相位; 连接到通孔的第二移相器，用于根据控制信号移位信号; 以及用于产生控制信号的控制器。 每个移相器包括具有耦合端子，直通端子，作为输出端子的隔离端子和输入端子的3-dB定向耦合器; 连接在耦合端子和接地端子之间的第一变容二极管，其电容根据控制信号而变化; 以及连接在贯通端子和接地端子之间的第二变容二极管，其电容根据控制信号而变化。

    Slot machine
    8.
    外观设计
    Slot machine 有权
    老虎机

    公开(公告)号：USD704272S1

    公开(公告)日：2014-05-06

    申请号：US29432167

    申请日：2012-09-13

    申请人： Sung-Uk Kim

    设计人： Sung-Uk Kim

    Receiving circuit of mobile communication terminal having feed forward linearizer
    10.
    发明授权
    Receiving circuit of mobile communication terminal having feed forward linearizer 失效
    具有前馈线性化的移动通信终端的接收电路

    公开(公告)号：US06393011B1

    公开(公告)日：2002-05-21

    申请号：US09222462

    申请日：1998-12-29

    申请人： Sung-Uk Kim

    发明人： Sung-Uk Kim

    IPC分类号： H04B7216

    CPC分类号： H04B1/123

    摘要： A receiving circuit of a mobile communication terminal which can prevent the deterioration of receiving sensitivity caused by an intermodulation product signal. The receiving circuit includes a front-end receiver, a controller, and a feed forward linearizer having an intermodulation product generator, a phase shifter and a variable attenuator. The feed forward linearizer generates an internodulation product signal in a feed forward path having the same magnitude as an intermodulation product signal in a main path, generated from the front-end receiver, but with a 180° phase difference. As a result, the intermodulation product signals are eliminated via vectorial addition of the signals in the main and feed forward paths.

    摘要翻译： 移动通信终端的接收电路，其可以防止由互调产物信号引起的接收灵敏度的劣化。 接收电路包括前端接收器，控制器和具有互调产物发生器，移相器和可变衰减器的前馈线性化器。 前馈线性化器在前馈路径中产生与前端接收器产生的主路径中的互调乘积信号相同幅度但具有180°相位差的前馈路径的调制乘积信号。 结果，通过在主和前馈路径中的信号的矢量相加来消除互调产物信号。