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    Low noise amplifier
    4.
    发明公开
    Low noise amplifier 有权
    RauscharmerVerstärker

    公开(公告)号：EP2466746A1

    公开(公告)日：2012-06-20

    申请号：EP10195354.5

    申请日：2010-12-16

    申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ)

    发明人： Mu, Fenghau

    IPC分类号： H03F1/22 ,  H03F1/34 ,  H03F3/45

    CPC分类号： H03F3/193 ,  H03F1/223 ,  H03F1/347 ,  H03F3/45179 ,  H03F2200/06 ,  H03F2200/09 ,  H03F2200/294 ,  H03F2200/541 ,  H03F2203/45386 ,  H03F2203/45394 ,  H03F2203/45516 ,  H03F2203/45522 ,  H03F2203/45528 ,  H03F2203/45544 ,  H03F2203/45554 ,  H03F2203/45591 ,  H03F2203/45621 ,  H03F2203/45631 ,  H03F2203/45638 ,  H03F2203/45662 ,  H03F2203/45731

    摘要： A low noise amplifier comprises at least one amplifying transistor (Ts1; Ts2) configured in a common source configuration to receive an input signal (RFin) at a gate terminal and provide an amplified signal at a drain terminal and at least one feedback path arranged to couple a part of the amplified signal back to the gate terminal and comprising a feedback impedance. The low noise amplifier further comprises a self-coupled step-up transformer having at least one primary winding (Lp) connected to a supply voltage (Vdd) and the drain terminal of the at least one amplifying transistor and at least one self-coupled secondary inductor winding (Lf1; Lf2) arranged in the feedback path. The low noise amplifier provides a better suppression for out-band interference and at the same time it has a wider input match bandwidth, decent conversion gain and decent noise figure without increasing power consumption.

    摘要翻译： 低噪声放大器包括至少一个配置在公共源配置中的放大晶体管（Ts1; Ts2），以在栅极端处接收输入信号（RFin），并在漏极端提供放大信号，并将至少一个反馈路径布置成 将放大的信号的一部分耦合到栅极端并包括反馈阻抗。 低噪声放大器还包括自耦合升压变压器，其具有连接到电源电压（Vdd）的至少一个初级绕组（Lp）和至少一个放大晶体管的漏极端子和至少一个自耦合次级 电感绕组（Lf1; Lf2）布置在反馈路径中。 低噪声放大器为带外干扰提供了更好的抑制，同时具有更宽的输入匹配带宽，良好的转换增益和体面的噪声系数，而不增加功耗。

    Low noise amplifier and differential amplifier
    7.
    发明公开
    Low noise amplifier and differential amplifier 有权
    RauscharmerVerstärkerundDifferenzverstärker

    公开(公告)号：EP2056448A2

    公开(公告)日：2009-05-06

    申请号：EP08018346.0

    申请日：2008-10-20

    申请人： Icom Incorporated

    发明人： Yamaguchi, Kouichiro

    IPC分类号： H03F1/22 ,  H03F1/26 ,  H03F1/34 ,  H03F3/45 ,  H03F3/50

    CPC分类号： H03F1/26 ,  H03F1/14 ,  H03F1/22 ,  H03F1/347 ,  H03F3/19 ,  H03F3/45089 ,  H03F3/50 ,  H03F2200/117 ,  H03F2200/153 ,  H03F2200/294 ,  H03F2200/36 ,  H03F2200/372 ,  H03F2200/451 ,  H03F2203/45516 ,  H03F2203/45528 ,  H03F2203/45621 ,  H03F2203/45722 ,  H03F2203/45731 ,  H03F2203/5009 ,  H03F2203/5021

    摘要： In a double-loop negative feedback low noise amplifier having double negative feedback paths by a feedback transformer (23) and a feedback resistor (44) added to a cascode amplifier comprising transistors (24, 27) and a resistor (30), a phase compensation circuit comprising a capacitor (42) and a resistor (45) is added between the output terminal of the double-loop negative feedback low noise amplifier and the input terminal of the cascode amplifier, i.e., the input terminal of the input transistor (24), and a phase compensation circuit comprising a capacitor (43) and a resistor (28) is added to the upper-stage transistor of the cascode amplifier, i.e., the input terminal of the upper-stage transistor (27). Those phase compensation circuits enable a low noise negative feedback amplifier which maintains a high feedback loop gain to a high frequency band, has a wider bandwidth than a conventional one, and has a high dynamic range.

    摘要翻译： 在具有由反馈变压器（23）和反馈电阻（44）加上包括晶体管（24,27）和电阻器（30）的共源共栅放大器的双负反馈路径的双回路负反馈低噪声放大器中， 包括电容器（42）和电阻器（45）的补偿电路被添加在双回路负反馈低噪声放大器的输出端和共源共栅放大器的输入端之间，即输入晶体管（24）的输入端 ），并且包括电容器（43）和电阻器（28）的相位补偿电路被添加到级联放大器的上级晶体管，即上级晶体管（27）的输入端子。 这些相位补偿电路使得能够将高反馈环路增益保持在高频带的低噪声负反馈放大器具有比常规带宽更宽的带宽，并且具有高动态范围。