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    • 1. 发明授权
    • Control method and circuit for feedforward distortion compensation amplifier
    • 前馈失真补偿放大器的控制方法和电路
    • US06750706B2
    • 2004-06-15
    • US10167687
    • 2002-06-11
    • Kaoru IshidaToshimitsu MatsuyoshiNaoki TakachiYuji Saito
    • Kaoru IshidaToshimitsu MatsuyoshiNaoki TakachiYuji Saito
    • H03F366
    • H03F1/3235H03F1/3229H03F2201/3212
    • A method of controlling a feedforward distortion compensation amplifier has steps of detecting a distortion component generated in a main amplifier by coupling a signal branched from a signal input to the main amplifier and containing a plurality of carriers of different frequencies to a signal branched from an output signal from the main amplifier so that the coupling causes the carrier components to cancel each other, recoupling the signal resulting from the coupling to the output signal from the main amplifier, and adjusting an amplitude and phase of at least one of the signals to be recoupled so that distortion components cancel each other upon recoupling, wherein a first and second pilot signals obtained from a first and second pilot signal sources are inserted into the input signal to or output signal from the main amplifier, parts of the signal resulting from the recoupling are taken out through branching, and the signals taken out through branching are mixed with the first and second pilot signals, respectively, and thus down-converted to generate down convert signals so that control signals to adjust the amplitude and phase are generated according to the down convert signals.
    • 控制前馈失真补偿放大器的方法具有通过将从输入信号分支到主放大器并将不同频率的多个载波分支的信号耦合到从输出信号分支的信号来检测在主放大器中产生的失真分量的步骤 使得耦合使得载波分量彼此抵消,将耦合产生的信号重新耦合到来自主放大器的输出信号,并且调整要重新耦合的至少一个信号的振幅和相位,从而 该失真分量在重新耦合时彼此抵消,其中从第一和第二导频信号源获得的第一和第二导频信号被插入到主放大器的输入信号中或从主放大器输出信号,取出由重新耦合产生的信号的部分 通过分支输出,并且通过分支取出的信号与第一和第二部分混合 并且因此下变频以产生下变频信号,从而根据降频转换信号产生调节幅度和相位的控制信号。
    • 2. 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 。