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    • 10. 发明授权
    • Self-tuned matching network for high efficient power amplifiers
    • 用于高效功率放大器的自调整匹配网络
    • US06977562B2
    • 2005-12-20
    • US10251273
    • 2002-09-19
    • Chul Hong Park
    • Chul Hong Park
    • H03F3/21H01P5/04H03F1/08H03F3/24H03H7/40H03H7/38
    • H03H7/40H01P5/04
    • A passive interface circuit for coupling an output signal from a power amplifier to a load is disclosed. The interface presents an impedance to the power amplifier that increases as the power level in the output signal decreases. In one embodiment, the interface circuit includes a fixed network and a capacitor having a capacitance that varies with the potential across the capacitor. The fixed network couples the output signal to the load. The capacitor is connected in parallel with the load and has a capacitance that increases in response to an increase in potential across the capacitor. The capacitor is preferably a MEM capacitor having plates that move with respect to one another in response to changes in the average potential difference between the plates.
    • 公开了一种用于将功率放大器的输出信号耦合到负载的无源接口电路。 该接口提供了功率放大器的阻抗,随着输出信号中的功率电平的减小而增加。 在一个实施例中,接口电路包括固定网络和具有随电容器两端的电位而变化的电容的电容器。 固定网络将输出信号耦合到负载。 电容器与负载并联连接,并且具有随着电容器两端的电位增加而增加的电容。 电容器优选地是具有响应于板之间的平均电位差的变化而相对于彼此移动的板的MEM电容器。