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    • 4. 发明公开
    • 고 선형성 트랜스컨덕턴스 증폭기
    • 高线性交感放大器
    • KR1020090032921A
    • 2009-04-01
    • KR1020080028810
    • 2008-03-28
    • 한국과학기술원
    • 이상근강호석박철순
    • H03F3/45
    • H03F1/3211H03F3/45179H03F3/45188H03F2203/45024H03F2203/45188
    • A highly linear transconductance amplifier using source degeneration is provided to improve linearity by obtaining transconductance from a source degeneration differential amplifier. Loaders(514, 516) are composed of a first load terminal and a second load terminal having predetermined resistance. Main differential amplifiers(510,512) are connected between the loader and the voltage-dependent resistor, and the first input voltage and the second input voltage differentially are amplified and outputted. A bias current source(500) biases the main differential amplifier, and the source degeneration resistor and non- linear-resistors(506,508) are connected between the main differential amplifier and the bias current source.
    • 提供使用源退化的高度线性的跨导放大器,以通过从源极退化差分放大器获得跨导来提高线性度。 装载机(514,516)由具有预定电阻的第一负载端子和第二负载端子构成。 主差分放大器(510,512)连接在加载器和电压相关电阻之间,第一输入电压和第二输入电压差分放大并输出。 偏置电流源(500)偏置主差分放大器,源极退化电阻和非线性电阻(506,508)连接在主差分放大器和偏置电流源之间。
    • 6. 发明公开
    • 자동 이득 제어를 갖는 무선 주파수 저잡음 증폭기
    • 具有自动增益控制的无线电频率低噪声放大器
    • KR1020060122915A
    • 2006-11-30
    • KR1020067016195
    • 2005-02-02
    • 실리콘 래버래토리즈 인코포레이티드
    • 크론,앤드류,더블유.
    • H03F3/45H03G1/00
    • H03G1/0023H03F1/26H03F3/193H03F3/45179H03F2200/06H03F2200/294H03F2200/372H03F2203/45024H03F2203/45464H03F2203/45638H03G1/0035H03G7/001
    • A low noise amplifier (500) includes a first transconductance device (326) having a control electrode for receiving a first input signal, and a first current electrode; a first load device (322) having a first terminal coupled to a first power supply voltage terminal and a second terminal coupled to the first current electrode of the first transconductance device (326) and forming a first output voltage signal; a second transconductance device (336) having a control electrode for receiving a second input signal, and a second current electrode; a second load device (332) having a first terminal coupled to the first power supply voltage terminal and a second terminal coupled to the first current electrode of the second transconductance device (336) and forming a second output voltage signal; and an attenuation device (340) coupled between the first current electrodes of the first (326) and second (336) transconductance devices and having a control input terminal for receiving a control voltage thereon.
    • 低噪声放大器(500)包括具有用于接收第一输入信号的控制电极的第一跨导器件(326)和第一电流电极; 第一负载装置(322),其具有耦合到第一电源电压端子的第一端子和耦合到第一跨导装置(326)的第一电流电极的第二端子,并形成第一输出电压信号; 具有用于接收第二输入信号的控制电极的第二跨导装置(336)和第二电流电极; 第二负载装置(332),具有耦合到第一电源电压端子的第一端子和耦合到第二跨导装置(336)的第一电流电极的第二端子并形成第二输出电压信号; 以及耦合在第一(326)和第二(336)跨导装置的第一电流电极之间并具有用于在其上接收控制电压的控制输入端的衰减装置(340)。