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    • 5. 发明授权
    • Broadband variable gain amplifier with high linearity and variable gain characteristic
    • 具有高线性度和可变增益特性的宽带可变增益放大器
    • US06882226B2
    • 2005-04-19
    • US10438047
    • 2003-05-15
    • Youngho ChoBo-Eun KimBonkee Kim
    • Youngho ChoBo-Eun KimBonkee Kim
    • H03G1/00H03G3/30H03F1/36
    • H03F1/342H03F3/45183H03F2200/108H03F2200/117H03F2200/141H03F2203/45532H03G1/007
    • A broadband variable gain amplifier with improved linearity and gain characteristic is provided. According to the present invention, the broadband variable gain amplifier comprises: an amplification unit for amplifying an input signal applied to an input terminal and outputting an amplified signal to an output terminal; and a gain control unit which is connected between the input and output terminals, and for controlling gain of said amplification unit, wherein said gain control unit comprises: a variable resistance unit whose resistance value is varied according to a control signal; and a broadband matching unit for proving an optimal impedance characteristic to the input terminal said amplification unit in a broad band, where in said variable gain resistance unit and said broadband matching unit is connected in parallel.
    • 提供了具有改善的线性度和增益特性的宽带可变增益放大器。 根据本发明,宽带可变增益放大器包括:放大单元,用于放大施加到输入端的输入信号,并将放大的信号输出到输出端; 以及增益控制单元,其连接在所述输入和输出端子之间并用于控制所述放大单元的增益,其中所述增益控制单元包括:电阻值根据控制信号而变化的可变电阻单元; 以及宽带匹配单元,用于向所述放大单元在宽带中证明最佳阻抗特性,其中所述可变增益电阻单元和所述宽带匹配单元并联连接。