High-frequency power amplifier
    1.
    发明授权
    High-frequency power amplifier 有权
    高频功率放大器

    公开(公告)号:US07368988B2

    公开(公告)日:2008-05-06

    申请号:US11489609

    申请日:2006-07-20

    IPC分类号: H03G5/16

    摘要: In a base-bias-control-type high-frequency power amplifier with a plural stage configuration, a rising voltage of a base bias current supplied to an initial stage transistor is made lower than a rising voltage of a base bias current supplied to a second stage transistor by a bias circuit, and a difference between the both voltages is set to be smaller than a base-emitter voltage of an amplifying stage transistor. Also, a rising voltage of a base bias current supplied to a third stage transistor is made equal to the rising voltage of the base bias current supplied to an initial stage transistor. Accordingly, a technology capable of improving the power control linearity can be provided in a high-frequency power amplifier used in a polar-loop transmitter or the like.

    摘要翻译: 在具有多级配置的基极偏置控制型高频功率放大器中,使提供给初级级晶体管的基极偏置电流的上升电压低于提供给第二级的基极偏置电流的上升电压 并且两个电压之间的差被设置为小于放大级晶体管的基极 - 发射极电压。 此外,使提供给第三级晶体管的基极偏置电流的上升电压等于提供给初级晶体管的基极偏置电流的上升电压。 因此,能够提高功率控制线性度的技术能够在用于极环回路发送机等的高频功率放大器中提供。

    High-frequency power amplifier
    5.
    发明申请
    High-frequency power amplifier 有权
    高频功率放大器

    公开(公告)号:US20070046370A1

    公开(公告)日:2007-03-01

    申请号:US11489609

    申请日:2006-07-20

    IPC分类号: H03G3/10

    摘要: In a base-bias-control-type high-frequency power amplifier with a plural stage configuration, a rising voltage of a base bias current supplied to an initial stage transistor is made lower than a rising voltage of a base bias current supplied to a second stage transistor by a bias circuit, and a difference between the both voltages is set to be smaller than a base-emitter voltage of an amplifying stage transistor. Also, a rising voltage of a base bias current supplied to a third stage transistor is made equal to the rising voltage of the base bias current supplied to an initial stage transistor. Accordingly, a technology capable of improving the power control linearity can be provided in a high-frequency power amplifier used in a polar-loop transmitter or the like.

    摘要翻译: 在具有多级配置的基极偏置控制型高频功率放大器中,使提供给初级级晶体管的基极偏置电流的上升电压低于提供给第二级的基极偏置电流的上升电压 并且两个电压之间的差被设置为小于放大级晶体管的基极 - 发射极电压。 此外,使提供给第三级晶体管的基极偏置电流的上升电压等于提供给初级晶体管的基极偏置电流的上升电压。 因此,能够提高功率控制线性度的技术能够在用于极环回路发送机等的高频功率放大器中提供。

    Power amplifier module
    9.
    发明授权
    Power amplifier module 失效
    功率放大器模块

    公开(公告)号:US06816017B2

    公开(公告)日:2004-11-09

    申请号:US09931877

    申请日:2001-08-20

    IPC分类号: H03F152

    摘要: 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.

    摘要翻译: 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。