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    • 2. 发明公开
    • 선형성이 향상된 차동 증폭 회로
    • 高线性差分放大电路
    • KR1020090093352A
    • 2009-09-02
    • KR1020080018826
    • 2008-02-29
    • 인티그런트 테크놀로지즈(주)
    • 김종식한상원신현철
    • H03F3/45H03F1/32
    • H03F3/45188H03F1/223H03F1/3205H03F1/3211H03F3/195H03F3/45201H03F3/45677H03F3/4569H03F2200/108H03F2200/451H03F2203/45008H03F2203/45362H03F2203/45392H03F2203/45464H03F2203/45496
    • A highly linear differential amplifying circuit is provided to improve the linearity at high output power by applying a resistive source degeneration structure to a conventional differential multiple-gated transistor. In a highly linear differential amplifying circuit, a differential amplification circuit comprises a differential amplifier(10) and a source attenuation resistive portion(20). The differential amplifier comprises a main part differential amplifier(120) and a secondary differential amplifier(110). The differential amplifier is formed as a differential pair to amplify the difference of two input signals. A supplementary differential amplifier is connected in parallel with the main differential amplifier, and a second differential coefficient of the transconductance of the second differential coefficient and a second differential coefficient of the transconductance of supplementary differential amplifier are offset. The second differential coefficient of the transconductance of the main differential amplifier has a negative value, and the second differential coefficient of the transconductance of the supplementary differential amplifier has a positive value.
    • 提供了一种高度线性的差分放大电路,通过将电阻源退化结构应用于传统的差分多门控晶体管来提高高输出功率下的线性度。 在高度线性的差分放大电路中,差分放大电路包括差分放大器(10)和源极衰减电阻部分(20)。 差分放大器包括主要部分差分放大器(120)和次级差分放大器(110)。 差分放大器形成为差分对,以放大两个输入信号的差。 辅助差分放大器与主差分放大器并联连接,第二微分系数的跨导的第二微分系数和补充差分放大器的跨导的第二微分系数被偏移。 主差分放大器的跨导的第二微分系数为负值,补充差分放大器的跨导的第二微分系数为正值。