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    • 5. 发明授权
    • Power amplifier module with stable idling current
    • 功率放大器模块具有稳定的怠速电流
    • US06731171B2
    • 2004-05-04
    • US10080558
    • 2002-02-25
    • Kiichi Yamashita
    • Kiichi Yamashita
    • H03G330
    • H03F3/3435H03F1/301H03F1/302H03F3/189H03F3/345
    • A power amplifier module includes a bias circuit to produce an idling current and a power amplifier of which the gain is controlled by the idling current produced by the bias circuit. Effects of changes of control voltage and ambient temperature of the power amplifier module can be removed by a first detector in the bias circuit to detect changes of the control voltage and a second detector in the bias circuit to detect changes of the ambient temperature. The bias circuit may further include a differential circuit to make error amplification with the first detector provided to perform as a standard voltage source for ambient temperature detection of the second detector and the second detector provided to perform as a standard voltage source for control-voltage detection of the first detector. Thus, they serve as detection circuits or standard voltage sources mutually.
    • 功率放大器模块包括产生怠速电流的偏置电路和由偏置电路产生的空载电流来控制增益的功率放大器。 功率放大器模块的控制电压和环境温度的变化的影响可以通过偏置电路中的第一检测器去除,以检测控制电压的变化和偏置电路中的第二检测器,以检测环境温度的变化。 偏置电路还可以包括差分电路,以便利用第一检测器进行误差放大,以提供作为用于第二检测器和第二检测器的环境温度检测的标准电压源,所述第二检测器被提供用于执行用于控制电压检测的标准电压源 的第一个检测器。 因此,它们用作检测电路或标准电压源。
    • 10. 发明授权
    • Power amplifier module
    • 功率放大器模块
    • US06816017B2
    • 2004-11-09
    • US09931877
    • 2001-08-20
    • Kiichi YamashitaTomonori TanoueIsao OhbuKenji Sekine
    • Kiichi YamashitaTomonori TanoueIsao OhbuKenji Sekine
    • H03F152
    • H03F3/19H03F1/0261H03F1/302H03F3/347H03F2200/444
    • A power amplifier module is provided with a function of protecting an amplifying device against destruction caused by a standing wave by reflection from an antenna end in load variation. Increase in base current from idling current of a final stage amplifying portion GaAs-HBT in load variation is detected and canceled and collector current is restrained to thereby prevent an increase in output and prevent destruction of GaAs-RET. By also using a function of successively lowering idling current when power source voltage is elevated and a clipping function of diodes connected in parallel with output stage GaAs-RET, voltage as well as current more than necessary are avoided from being applied on the output stage GaAs-RET.
    • 功率放大器模块具有保护放大装置的功能,以防止由负载变化引起的天线反射引起的驻波的破坏。 检测并抵消了负载变化中的最终级放大部分GaAs-HBT的空载电流的基极电流的增加,并抑制集电极电流,从而防止输出增加并防止GaAs-RET的破坏。 通过使用在电源电压升高时连续降低空载电流并且与输出级GaAs-RET并联连接的二极管的限幅功能也被避免施加在输出级GaAs上的功能。 -RET。