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    • 3. 发明授权
    • High-efficiency mixed-mode power amplifier
    • 高效率混合模式功率放大器
    • US07436257B2
    • 2008-10-14
    • US11482576
    • 2006-07-07
    • Min ParkYun Ho ChoiKyung Hwan ParkSeok Bong HyunSeong Su Park
    • Min ParkYun Ho ChoiKyung Hwan ParkSeok Bong HyunSeong Su Park
    • H03F1/14
    • H03F1/0222H03F1/0277
    • Provided is a power amplifier of a low-power consumption system that has linearity at a peak output power while increasing efficiency in a most frequently used range, and thereby enables a battery to last longer. The power amplifier includes an input impedance matcher for impedance-matching a signal input from the outside; a high-power amplifier and a low-power amplifier for amplifying the signal having passed through the input impedance matcher; an amplification controller controlling the high-power amplifier and low-power amplifier according to the power level of the input signal; an output impedance matcher for impedance-matching the signal amplified by the high-power amplifier and low-power amplifier; and a dynamic voltage supplier for supplying the low-power amplifier with a variable driving voltage. With the constitution set forth above, linearity at peak output power is maintained, and efficiency increases in the most frequently used range, thereby enabling the battery of a handheld to last longer.
    • 提供了一种低功耗系统的功率放大器,其在峰值输出功率下具有线性度,同时提高了最常用范围内的效率,从而使得电池能够持续更长时间。 功率放大器包括用于阻抗匹配从外部输入的信号的输入阻抗匹配器; 大功率放大器和用于放大已经通过输入阻抗匹配器的信号的低功率放大器; 放大控制器根据输入信号的功率电平控制大功率放大器和低功率放大器; 用于阻抗匹配由大功率放大器和低功率放大器放大的信号的输出阻抗匹配器; 以及用于向低功率放大器供应可变驱动电压的动态电压供应器。 根据上述结构,保持峰值输出功率的线性度,并且在最常用的范围内效率增加,从而使得手持式电池的持续时间更长。