Bias circuit and bias supply method for a multistage power amplifier
    8.
    发明授权
    Bias circuit and bias supply method for a multistage power amplifier 失效
    用于多级功率放大器的偏置电路和偏置电源

    公开(公告)号:US06236266B1

    公开(公告)日:2001-05-22

    申请号:US09444406

    申请日:1999-11-22

    IPC分类号: H03G516

    CPC分类号: H03F1/302 H03F3/19 H03F3/72

    摘要: A bias circuit and bias supply method for a multistage power amplifier including heterojunction bipolar transistors for power amplifying a high frequency signal and suppressing an increase in Rx noise during low power output operation of the multistage power amplifier. The bias circuit outputs a control signal Vapc from an external control circuit to the base of only a first-stage amplifier HBT in the multistage power amplifier. To the base of the second and each later power amplifying stage HBT of the multistage power amplifier, the bias circuit supplies a bias current regulated by voltage stabilizers according to the control signal Vapc.

    摘要翻译: 一种用于多级功率放大器的偏置电路和偏置电源方法,包括用于功率放大高频信号的异质结双极晶体管,并抑制多级功率放大器的低功率输出操作期间的Rx噪声的增加。 偏置电路将控制信号Vapc从外部控制电路输出到仅在多级功率放大器中的第一级放大器HBT的基极。 对于多级功率放大器的第二和每个后续功率放大级HBT的基极,偏置电路根据控制信号Vapc提供由电压稳定器调节的偏置电流。