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1. 发明申请

US20040189379A1 Power amplification circuit and communication device using the same 有权
标题翻译：功率放大电路和通信设备使用相同
公开(公告)号：US20040189379A1
公开(公告)日：2004-09-30
申请号：US10706138
申请日：2003-11-13
申请人： Sharp Kabushiki Kaisha
发明人： Keiichi Sakuno
IPC分类号： H03F001/36
CPC分类号： H03F1/34 , H03F2200/151 , H03F2200/372
摘要： A power amplification circuit, and a communication device using the same, which are capable of suppressing gain decreases of a power amplifier due to increases in input signal power in a state near the saturation operation, capable of reducing its size, and low in distortion and high in efficiency. The power amplification circuit includes a power amplifier and a negative feedback circuit connected between a signal input terminal and a signal output terminal of the power amplifier. Impedance of the negative feedback circuit depends on a signal voltage occurring across the negative feedback circuit. By adjusting the characteristic that the negative feedback quantity of the negative feedback circuit to the power amplifier is variable depending on input signal power, gain fluctuations of the power amplifier due to increases or decreases of input signal power or output signal power around a specified output signal power are suppressed.
摘要翻译：功率放大电路及其使用方法的功能放大电路能够抑制在饱和运算附近的状态下由于输入信号功率的增加导致的功率放大器的增益减小，能够减小其尺寸，并且具有低的失真和效率高功率放大电路包括功率放大器和连接在功率放大器的信号输入端子和信号输出端子之间的负反馈电路。负反馈电路的阻抗取决于负反馈电路两端产生的信号电压。通过调整负值反馈电路对功率放大器的负反馈量根据输入信号功率而变化的特性，由于输入信号功率的增减或输出信号功率在指定输出信号周围的增益波动权力被抑制

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