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    • 78. 发明授权
    • Feedforward amplifier, feedforward amplification method
    • 前馈放大器,前馈放大法
    • US06734727B2
    • 2004-05-11
    • US10225222
    • 2002-08-21
    • Kaoru IshidaNaoki TakachiYuji Saito
    • Kaoru IshidaNaoki TakachiYuji Saito
    • H03F366
    • H03F1/3229H03F1/3235H03F2201/3212
    • A feedforward amplifier includes a main amplifier for amplifying an input signal, a control circuit for generating a predetermined pilot signal based on the output of a local oscillator and a frequency divider included in the control circuit, and a coupler for combining the input signal or the amplified signal with the pilot signal to generate a combined signal. A first coupler and a second coupler are provided for extracting any distortion component from the combined signal. A vector adjuster, an error amplifier, and a third coupler are provided for removing the extracted distortion component from the combined signal to generate an output signal. An orthogonal detector is provided for using any one of the pilot signal, or the output of the local oscillator, the frequency divider, and the combination of the vector adjuster, error amplifier, and the third coupler to make an adjustment for removing the distortion component.
    • 前馈放大器包括用于放大输入信号的主放大器,用于基于本地振荡器的输出和包括在控制电路中的分频器产生预定导频信号的控制电路,以及用于将输入信号或 放大信号与导频信号产生组合信号。 提供第一耦合器和第二耦合器用于从组合信号中提取任何失真分量。 提供矢量调节器,误差放大器和第三耦合器,用于从组合信号中去除提取的失真分量以产生输出信号。 提供正交检测器,用于使用导频信号,本地振荡器的输出,分频器以及矢量调节器,误差放大器和第三耦合器的组合中的任何一个来进行调整以去除失真分量 。