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    • 4. 发明申请
    • Dual mode power amplifier
    • 双模功率放大器
    • US20070096810A1
    • 2007-05-03
    • US11259006
    • 2005-10-25
    • Michael HagemanDale BrandtDavid Ripley
    • Michael HagemanDale BrandtDavid Ripley
    • H03G5/16
    • H03G3/3042H03F1/0277H03F3/211H03F3/72H03F2200/222H03F2200/387H03F2203/7206H03F2203/7239
    • A power amplifier is configured to operate in a first gain mode and a second gain mode. A first power amplifier input stage has an input and an output. A second power amplifier input stage has an input and an output, where the output of the second power amplifier input stage is coupled to the output of the first power amplifier input stage. The first input stage is turned on in response to a first bias voltage in the first gain mode and the second input stage is turned on in response to a second bias voltage in the second gain mode. Alternatively, a first input stage and an intermediate stage can be switched off by turning off their respective bias voltages, and a second input stage can be switched on by turning on its respective bias voltage; the intermediate stage and the second input stage sharing a common output.
    • 功率放大器被配置为以第一增益模式和第二增益模式操作。 第一功率放大器输入级具有输入和输出。 第二功率放大器输入级具有输入和输出,其中第二功率放大器输入级的输出耦合到第一功率放大器输入级的输出。 第一输入级响应于第一增益模式中的第一偏置电压而导通,并且第二输入级响应于第二增益模式中的第二偏置电压而导通。 或者,可以通过关闭它们各自的偏置电压来关闭第一输入级和中间级,并且可以通过接通其各自的偏置电压来接通第二输入级; 中间级和第二输入级共享公共输出。