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    • 4. 发明申请
    • POWER SENSITIVE VARIABLE ATTENUATOR
    • 功率敏感变量衰减器
    • US20100182092A1
    • 2010-07-22
    • US12355865
    • 2009-01-19
    • John C. TremblayFrancois Y. Colomb
    • John C. TremblayFrancois Y. Colomb
    • H01P1/22H03G3/00
    • H03H11/245
    • A variable attenuator having: an input port; a semiconductor device having a control electrode for controlling carriers flowing between a first electrode and a second electrode, such control electrode being coupled to one of the first and second electrodes, one of the first and second electrodes being coupled to the input port and the other one of the first and second electrodes being coupled to a reference potential to form an active device characterized by such device having a resistivity in the device to the flow of carriers substantially constant when such device is fed through input port with a signal having a relatively small power level and having a resistivity in the device to the flow of carriers which is nonlinear when such device is fed through input port with a signal having a relatively large power level; and an output port coupled to one of the first and second electrodes coupled to the input port. Such a network may be used with a power amplifier to reduce excessive small signal gain and soft compression.
    • 一种可变衰减器,具有:输入端口; 具有用于控制在第一电极和第二电极之间流动的载流子的控制电极的半导体器件,所述控制电极耦合到第一和第二电极中的一个,第一和第二电极中的一个耦合到输入端口,另一个耦合到输入端口 所述第一和第二电极中的一个耦合到参考电位以形成有源器件,其特征在于,当所述器件通过输入端口馈送具有相对较小的信号时,所述器件具有器件中的电阻率与载流子基本上恒定的特性 功率电平并且当该装置通过具有相对大的功率电平的信号通过输入端口馈送时,该装置中的载流子电阻率是非线性的; 以及耦合到耦合到输入端口的第一和第二电极中的一个的输出端口。 这样的网络可以与功率放大器一起使用以减少过大的小信号增益和软压缩。