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    가변 게인 저잡음 증폭기 회로 및 이를 구비하는 무선 통신수신기
    1.
    发明公开
    가변 게인 저잡음 증폭기 회로 및 이를 구비하는 무선 통신수신기 有权
    具有可控制的低噪声放大器和无线通信接收器

    公开(公告)号：KR1020070076274A

    公开(公告)日：2007-07-24

    申请号：KR1020060005444

    申请日：2006-01-18

    Applicant: 삼성전자주식회사

    Inventor： 장재홍 ,  류성한 ,  문현원 ,  박병하 ,  이상엽 ,  정한근 ,  제민규 ,  한광석 ,  허승찬

    IPC: H03F3/45 ,  H03F1/26

    CPC classification number: H03F1/26 ,  H03F1/223 ,  H03F1/342 ,  H03F1/483 ,  H03F3/193 ,  H03F3/45183 ,  H03F2200/294 ,  H03F2200/42 ,  H03F2200/451 ,  H03F2200/54 ,  H03F2203/45511 ,  H03G3/3078

    Abstract: A gain controllable low noise amplifier and a wireless communication receiver having the same are provided to improve a noise index and to control a gain without breaking input impedance matching in a wide frequency band range. A gain controllable low noise amplifier includes a first transistor(M1), a second transistor(M2), and a control circuit(400). The first transistor(M1) is coupled at an input node and an output node, and generates an output signal by amplifying an input signal. The second transistor(M2) feed backs the output signal to the input node. The control circuit(400) complementarily controls the transconductance of the first transistor(M1) and the second transistor(M2).

    Abstract translation: 提供增益可控的低噪声放大器和具有该增益可控低噪声放大器的无线通信接收器，以改善噪声指数并且在不破坏宽频带范围内的输入阻抗匹配的情况下控制增益。 增益可控低噪声放大器包括第一晶体管（M1），第二晶体管（M2）和控制电路（400）。 第一晶体管（M1）在输入节点和输出节点处耦合，并且通过放大输入信号来产生输出信号。 第二晶体管（M2）将输出信号反馈到输入节点。 控制电路（400）互补地控制第一晶体管（M1）和第二晶体管（M2）的跨导。

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