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CN109150212A 用于包络跟踪调制器的负载电流传感器 有权

  • Patent Title: 用于包络跟踪调制器的负载电流传感器
  • Patent Title (English): LOAD CURRENT SENSOR FOR ENVELOPE TRACKING MODULATOR
  • Application No.: CN201810976470.X
    Application Date: 2015-02-24
  • Publication No.: CN109150212A
    Publication Date: 2019-01-04
  • Inventor: 罗伯特·艾文 , 姜虹
  • Applicant: 华为技术有限公司
  • Applicant Address: 广东省深圳市龙岗区坂田华为总部办公楼
  • Assignee: 华为技术有限公司
  • Current Assignee: 华为技术有限公司
  • Current Assignee Address: 广东省深圳市龙岗区坂田华为总部办公楼
  • Priority: 14/188,305 20140224 US
  • Main IPC: H04B1/04
  • IPC: H04B1/04
用于包络跟踪调制器的负载电流传感器
Abstract:
一种用于感测包络跟踪(ET)调制器(1150)的负载电流的装置(1000)和方法，所述装置和方法使得能够测量功率放大器(130)的负载阻抗。与负载阻抗特性相关联的损伤可以通过校准和预失真进行抑制，而不是(如现有技术所做的)通过反馈进行抑制。所述ET调制器(1150)提供了可重新配置为用于感测所述负载电流的目的的线性调节器的开关调节器。这允许开环操作所述ET调制器(1150)，从而消除了(现有技术中使用的)由于利用环路滤波器和误差放大器导致的功耗开销，并且实现了更高的整体效率。
Abstract(English):

An apparatus 1000 and method for sensing load current of an envelope tracking (ET) modulator 1150 enables load impedance of a power amplifier 130 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 1150 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 1150 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.

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