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    • 2. 发明申请
    • IMPROVEMENTS IN OR RELATING TO POWER AMPLIFIERS
    • 在功率放大器或与功率放大器相关的改进
    • WO2003061116A1
    • 2003-07-24
    • PCT/EP2003/000101
    • 2003-01-08
    • ROKE MANOR RESEARCH LIMITEDDOMOKOS, John
    • DOMOKOS, John
    • H03F1/32
    • H03F1/3294
    • There is provided an apparatus for compensating for envelope frequency and/or carrier wave frequency dependence in third order intermodulation (IM3) products. Frequency dependence compensation reduces peak error power and thereby increases the efficiency of error amplifiers, such as those used in base stations used in telecommunications. In order to compensate for non-linear distortion, the apparatus is configured with a delay or "memory" unit, T1. The apparatus may be implemented as a single RF-ASIC or in a cascade of more than one such ASICs. The apparatus may also be incorporated within a feed forward amplifier arrangement.
    • 提供了用于补偿三阶互调(IM3)乘积中的包络频率和/或载波频率依赖性的装置。 频率相关补偿降低峰值误差功率,从而提高误差放大器的效率,例如在电信中使用的基站中使用的误差放大器的效率。 为了补偿非线性失真,该装置配置有延迟或“存储器”单元T1。 该装置可以被实现为单个RF-ASIC或多于一个这样的ASIC的级联。 该装置还可以并入前馈放大器装置内。
    • 7. 发明申请
    • A POWER AMPLIFIER SYSTEM
    • 功率放大器系统
    • WO2004019486A1
    • 2004-03-04
    • PCT/GB2003/003414
    • 2003-08-06
    • ROKE MANOR RESEARCH LIMITEDSMITH, Christopher, NigelDOMOKOS, John
    • DOMOKOS, John
    • H03F1/02
    • H03G3/3042H03F1/0222H03F1/0244H03G3/004H03G3/3047
    • A power amplifier system (1) comprises a control circuit; a power amplifier (3) and a delay device (8). The control circuit comprises a detector (4) for detecting an instantaneous power level of an input signal; a threshold comparator (5); and a power supply voltage source (6). The threshold comparator is provided with a plurality of preset thresholds (TH 1 , TH 2 , TH 3 ); wherein the threshold comparator compares the detected power level with the preset thresholds; wherein the power supply voltage (V 1 , V 2 , V 3 and V 4 ) is switched according to the output of the threshold comparator; and wherein the delay device (8) delays the input signal to the power amplifier to enable the power supply voltage to be adapted to the detected power level, such that the efficiency of the power amplifier (3) is optimised.
    • 功率放大器系统(1)包括控制电路; 功率放大器(3)和延迟装置(8)。 控制电路包括用于检测输入信号的瞬时功率电平的检测器(4) 阈值比较器(5); 和电源电压源(6)。 阈值比较器具有多个预设阈值(TH1,TH2,TH3); 其中所述阈值比较器将检测到的功率电平与预设阈值进行比较; 其中所述电源电压(V1,V2,V3和V4)根据所述阈值比较器的输出而被切换; 并且其中所述延迟装置(8)将所述输入信号延迟到所述功率放大器以使所述电源电压适应于所述检测到的功率电平,使得所述功率放大器(3)的效率被优化。