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    • 8. 发明授权
    • Differential amplifier circuit and frequency mixer for improving linearity
    • 差分放大电路和混频器,提高线性度
    • US07808319B2
    • 2010-10-05
    • US12325400
    • 2008-12-01
    • Byung Sung KimTae Sung Kim
    • Byung Sung KimTae Sung Kim
    • H03F3/45
    • H03F3/45188H03D7/1441H03D7/1458H03D7/1491H03D2200/0043H03F1/3211H03F3/45183H03F2203/45318H03F2203/45386H03F2203/45544H03F2203/45608
    • A differential amplifier circuit and a frequency mixer for improving linearity are disclosed. The disclosed differential amplifier circuit includes first and second loads, a first output terminal for the first load, a second output terminal for the second load, a differential amplifying stage including a differential stage for amplifying a voltage difference between a first input stage and a second input stage, and a biasing current source for biasing the differential stage, and a non-linearity filtering circuit for filtering a non-linear signal generated from the differential amplifying stage. The non-linearity filtering circuit includes a first cross circuit including a first transistor to connect the first and second output terminals, and a second cross circuit including a second transistor to connect the first and second output terminals. The differential amplifier circuit achieves an improvement in linearity, as compared to conventional differential amplifier circuits, by offsetting, at a load side, a non-linear component generated at an active element of the differential amplifier circuit, to output only a linear current component.
    • 公开了一种用于提高线性度的差分放大器电路和混频器。 所公开的差分放大器电路包括第一和第二负载,用于第一负载的第一输出端,​​用于第二负载的第二输出端,差分放大级,包括用于放大第一输入级与第二负载之间的电压差的差分级 输入级和用于偏置差分级的偏置电流源,以及用于对从差分放大级产生的非线性信号进行滤波的非线性滤波电路。 非线性滤波电路包括:第一交叉电路,包括用于连接第一和第二输出端子的第一晶体管和包括第二晶体管的第二交叉电路,以连接第一和第二输出端子。 与传统的差分放大器电路相比,差分放大器电路通过在负载侧偏移在差分放大器电路的有源元件处产生的非线性分量来仅实现线性电流分量而实现了线性的改善。
    • 10. 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。