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    • 6. 发明授权
    • Variable gain wideband amplifier
    • 可变增益宽带放大器
    • US07274257B2
    • 2007-09-25
    • US11292208
    • 2005-12-02
    • Moon Sun KimWon Jin Baek
    • Moon Sun KimWon Jin Baek
    • H03G3/00
    • H03F1/223H03F1/3205H03F1/342H03F3/193H03F3/345H03F2200/117H03F2200/141H03F2200/372H03G1/007H03G1/0088
    • The invention relates to a feedback or feedforward type variable gain wideband amplifier. The variable gain wideband amplifier includes a feedback-type inversion amplifier circuit 310 for amplifying input Vin, a feedback-type non-inversion amplifier circuit 320 for amplifying input Vin, a power source circuit 330 for controlling the gain of the non-inversion amplifier circuit 320 and a load circuit 340 connected between a junction of output terminals of the inversion and non-inversion amplifier circuits 310 and 320 and power voltage potential VDD to control the gain of the amplifier circuits 310 and 320. The variable gain wideband amplifier of the invention is feedforward type, and outputs signals from the inversion and non-inversion amplifier circuits 310 and 320 via a single output terminal in order to attenuate third order intermodulation frequency IM3 generated from the amplifier circuits 310 and 320. Then, predetermined frequencies f1 and f2 included in the input signal are amplified.
    • 本发明涉及一种反馈或前馈型可变增益宽带放大器。 可变增益宽带放大器包括用于放大输入Vin的反馈型反相放大器电路310,用于放大输入Vin的反馈型非反相放大器电路320,用于控制非反相放大器电路的增益的电源电路330 320和连接在反相放大器电路310和非反相放大器电路310的输出端的接点和电源电压电位VDD之间的负载电路340,以控制放大器电路310和320的增益。本发明的可变增益宽带放大器 是前馈型,并且经由单个输出端子从反相和非反相放大器电路310和320输出信号,以衰减从放大器电路310和320产生的三阶互调频率IM 3。然后,预定频率f 1和 输入信号中包含的f 2被放大。
    • 7. 发明授权
    • Derivative superposition circuit for linearization
    • 用于线性化的导数叠加电路
    • US07570935B2
    • 2009-08-04
    • US11428345
    • 2006-06-30
    • Yoo Sam NaByung Sung KimWon Jin BaekMoon Sun Kim
    • Yoo Sam NaByung Sung KimWon Jin BaekMoon Sun Kim
    • H04B1/10H04B1/04
    • H03F1/3252
    • A derivative superposition circuit for linearization includes a first active element that is provided with first to third terminals and in which the magnitude and direction of current flowing from the second terminal to the third terminal changes on the basis of the magnitude of a voltage applied between the first and second terminals; and a second active element that is provided with first to third terminals and has complementary characteristics with the first active element. The first terminals of the first and second active elements are connected to each other so that a predetermined operational bias voltage is maintained by first and second power supplies through a first impedance, and are connected to an input end through a second impedance. The third terminals of the first and second active elements are connected to an output end, and the second terminals of the first and second active elements are connected to the second power supply through a third impedance.
    • 用于线性化的导数叠加电路包括设置有第一至第三端子的第一有源元件,并且其中从第二端子流到第三端子的电流的大小和方向基于施加在第二端子之间的电压的大小而变化 第一和第二终端; 以及设置有第一至第三端子并且与第一有源元件具有互补特性的第二有源元件。 第一和第二有源元件的第一端子彼此连接,使得通过第一阻抗由第一和第二电源维持预定的操作偏置电压,并且通过第二阻抗连接到输入端。 第一和第二有源元件的第三端子连接到输出端,并且第一和第二有源元件的第二端子通过第三阻抗连接到第二电源。