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    • 3. 发明申请
    • POWER AMPLIFIER
    • 功率放大器
    • US20120025907A1
    • 2012-02-02
    • US13024144
    • 2011-02-09
    • Bon Hoon KOOKi Yong SONSong Cheol HONGGyu Suck KIMYoo Sam Na
    • Bon Hoon KOOKi Yong SONSong Cheol HONGGyu Suck KIMYoo Sam Na
    • H03G3/20
    • H03F1/0266H03F3/195H03F2200/105H03F2200/555
    • There is provided a power amplifier capable of supplying variable bias to an amplifier circuit by accurately transferring the envelope components of an input signal during the supply of active bias power to the amplifier circuit. The power amplifier includes: an envelope detector detecting an envelope of an input signal; a bias power generator including at least one P-type MOSFET and one N-type MOSFET connected to each other in an inverter manner between a driving power terminal supplying driving power having a preset voltage level and a reference bias power terminal supplying preset reference bias power to generate bias power varied according to detection results from the envelope detector; and an amplifier amplifying the input signal according to the bias power level from the bias power generator.
    • 提供了一种功率放大器,其能够通过在将有源偏置功率提供给放大器电路期间精确地传送输入信号的包络分量来向放大器电路提供可变偏置。 功率放大器包括:检测输入信号的包络的包络检测器; 一个偏置功率发生器,它包括至少一个P型MOSFET和一个N型MOSFET,它们以一个反相器的方式相互连接,驱动电源端子提供具有预设电压电平的驱动电源和一个提供预设参考偏置功率的参考偏置电源端子 以产生根据来自包络检测器的检测结果而变化的偏置功率; 以及根据偏置功率发生器的偏置功率电平放大输入信号的放大器。