A Multiple-Input Digitally Controlled Buck Converter for Envelope Tracking Applications in Radiofrequency Power Amplifiers

被引：63
作者：
Rodriguez, Miguel [1 ]
Fernandez-Miaja, Pablo [1 ]
Rodriguez, Alberto [1 ]
Sebastian, Javier [1 ]
机构：
[1] Univ Oviedo, Power Supply Syst Grp, Dept Elect & Elect Engn, Gijon 33204, Spain
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2010年 / 25卷 / 02期
关键词：
DC-DC power conversion; energy management; HF amplifiers; switched mode power supplies; DESIGN;
D O I：
10.1109/TPEL.2009.2028732
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Wireless communication transmitters have very low efficiencies due to the use of linear radiofrequency power amplifiers. Several techniques have been proposed over the years to improve the efficiency of these systems. One of the most promising is called the envelope tracking technique, which is based on using a fast switching mode power supply to provide a varying voltage to the power amplifier that tracks the envelope of the transmitted signal. The amplifier can, thus, operate continuously near its theoretical maximum efficiency, greatly improving the overall efficiency of the communication system. This paper proposes a multilevel digitally controlled power supply suitable for this application. It is shown to perform very well, achieving very high efficiency, high-output power capability and tracking bandwidths above 50 kHz. This paper also shows that the proposed system is able to produce a 15% overall increase in efficiency in a complete envelope tracking system.
引用
收藏
页码：369 / 381
页数：13
相关论文
共 20 条
  • [1] ALBULET M, 2001, RF POWER AMPLIFIERS, P11
  • [2] Anderson DR, 2001, IEEE MTT S INT MICR, P1509, DOI 10.1109/MWSYM.2001.967189
  • [3] [Anonymous], 2006, 2006 37 IEEE POW EL, DOI DOI 10.1109/PESC.2006.1712188
  • [4] Cantrell WH, 2003, IEEE MTT S INT MICR, P1721, DOI 10.1109/MWSYM.2003.1210471
  • [5] Dancy AP, 1997, IEEE POWER ELECTRON, P21, DOI 10.1109/PESC.1997.616620
  • [6] HOLMES DG, 2003, IEEE PRESS SERIES PO, P95
  • [7] Ultrafast Tracking Power Supply With Fourth-Order Output Filter and Fixed-Frequency Hysteretic Control
    Hoyerby, Mikkel C. W.
    Andersen, Michael A. E.
    [J]. IEEE TRANSACTIONS ON POWER ELECTRONICS, 2008, 23 (05) : 2387 - 2398
  • [8] Carrier Distortion in Hysteretic Self-Oscillating Class-D Audio Power Amplifiers: Analysis and Optimization
    Hoyerby, Mikkel C. W.
    Andersen, Michael A. E.
    [J]. IEEE TRANSACTIONS ON POWER ELECTRONICS, 2009, 24 (3-4) : 714 - 729
  • [9] FPGA-Based Digital Pulsewidth Modulator With Time Resolution Under 2 ns
    Huerta, Santa Concepcion
    de Castro, Angel
    Garcia, Oscar
    Cobos, Jose A.
    [J]. IEEE TRANSACTIONS ON POWER ELECTRONICS, 2008, 23 (06) : 3135 - 3141
  • [10] Signal transduction therapy for cancer - Whither now?
    Klein, Shoshana
    Levitzki, Alexander
    [J]. CURRENT SIGNAL TRANSDUCTION THERAPY, 2006, 1 (01) : 1 - 12
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