利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

24 条记录 (耗时 0.016 秒)

    OPEN LOOP DIGITAL PWM ENVELOPE TRACKING SYSTEM WITH DYNAMIC BOOSTING
    6.
    发明公开
    OPEN LOOP DIGITAL PWM ENVELOPE TRACKING SYSTEM WITH DYNAMIC BOOSTING 审中-公开
    带动态升压的开环数字PWM包络跟踪系统

    公开(公告)号：EP3198718A1

    公开(公告)日：2017-08-02

    申请号：EP15887299.4

    申请日：2015-12-01

    申请人： Huawei Technologies Co. Ltd.

    发明人： JIANG, Hong ,  AL-QAQ, Wael ,  IRVINE, Robert Grant ,  KOSTELNIK, Matthew M. ,  ZHANG, Zhihang

    IPC分类号： H03F1/02

    摘要： A system, apparatus and method is described for dynamically boosting (increasing) the power supply voltage to an envelope tracking (ET) modulator within a transmitter system when the target/desired power amplifier voltage supply is above a predetermined threshold (e.g., equal to the available power supply of the system, such as a battery). By boosting the power input supply to the ET modulator, the modulated power supply provided to the power amplifier (PA) is also increased. This reduces or eliminates clipping that normally occurs when the target/desired PA supply voltage is greater than the available power supply voltage and reduces distortion in the transmitted signal.

    摘要翻译： 描述了当目标/期望的功率放大器电压供应高于预定阈值（例如，等于 系统的可用电源，如电池）。 通过升高ET调制器的功率输入电源，提供给功率放大器（PA）的调制电源也增加。 这减少或消除了当目标/期望的PA供电电压大于可用电源电压时通常发生的削波，并且减少了发送信号中的失真。

    LOAD CURRENT SENSOR FOR ENVELOPE TRACKING MODULATOR
    7.
    发明公开
    LOAD CURRENT SENSOR FOR ENVELOPE TRACKING MODULATOR 审中-公开

    公开(公告)号：EP3033835A2

    公开(公告)日：2016-06-22

    申请号：EP15752832.4

    申请日：2015-02-24

    申请人： Huawei Technologies Co., Ltd.

    发明人： IRVINE, Robert ,  JIANG, Hong

    IPC分类号： H04B1/02

    CPC分类号： H03F1/0216 ,  H03F1/0227 ,  H03F1/025 ,  H03F1/3241 ,  H03F1/34 ,  H03F3/19 ,  H03F3/21 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/102 ,  H03F2200/351 ,  H03F2200/451 ,  H03F2200/507 ,  H03F2201/3215 ,  H04B1/0475 ,  H04B2001/0408 ,  H04B2001/0433 ,  H04L25/4902

    摘要： An apparatus and method for sensing load current of an envelope tracking (ET) modulator enables load impedance of a power amplifier to be measured. Impairments associated with the load impedance characteristic can be suppressed by calibration and predistortion instead of by feedback (as done in the prior art). The ET modulator provides a switching regulator that can be reconfigured as a linear regulator for the purpose of sensing the load current. This allows the ET modulator to be operated open-loop, thereby eliminating the power consumption overhead resulting from utilization of a loop filter and error amplifier (used in the prior art) and achieving a higher overall efficiency.

    摘要翻译： 用于感测包络跟踪（ET）调制器的负载电流的装置和方法使得能够测量功率放大器的负载阻抗。 与负载阻抗特性相关的损伤可以通过校准和预失真而不是通过反馈来抑制（如现有技术中所做的那样）。 ET调制器提供了一个开关稳压器，可以重新配置为线性稳压器，用于检测负载电流。 这允许ET调制器开环操作，由此消除了由于使用环路滤波器和误差放大器（在现有技术中使用）而导致的功耗开销并且实现了更高的整体效率。