首页> 外文会议>Annual IEEE Applied Power Electronics Conference and Exposition >10 MHz large signal bandwidth, 95 efficient power supply for 3G-4G cell phone base stations
【24h】

10 MHz large signal bandwidth, 95 efficient power supply for 3G-4G cell phone base stations

机译:10 MHz大信号带宽,3G-4G手机基站的95%高效电源

获取原文

摘要

To improve the efficiency of cell phone base station transmitters, it is desirable to run the RF Power Amplifier (RFPA) with an envelope modulating power supply that provides the RFPA with the voltage and current needed for maximum efficiency. However, cell phone transmission varies the RF output power considerably over short periods, with the average power significantly less than the peak transmission power, which is difficult for traditional power supplies to support efficiently. This paper describes a switched-mode 8-phase buck envelope modulating power supply with a lookup table that varies the duty cycle and operating frequency to maintain soft switching under all operating conditions, and with dynamic timing correction to keep the phases uniformly distributed in time except when tracking signal dynamics that require simultaneous switching of multiple phases. The power supply does not require active compensation to keep the phase currents balanced. The experimentally demonstrated power supply provides 10 MHz large signal bandwidth, >40 A/μsec current slew rate, with switching frequency of up to 15 MHz at 95% efficiency. The supply is suitable for 2-carrier WCDMA and LTE cell phone base stations.
机译:为了提高手机基站发射机的效率,希望利用信封调节电源运行RF功率放大器(RFPA),该电源提供RFPA,其具有最大效率所需的电压和电流。然而,手机传输显着改变了RF输出功率,在短时间内显着变化,平均功率显着小于峰值传输功率,这对于传统的电源很难有效地支持。本文介绍了一种开关模式8相块性的包络调制电源,带有查找表,可在所有操作条件下改变占空比和工作频率,以保持软切换,并具有动态定时校正,以保持均匀分布的阶段分布在时间之外当跟踪需要同时切换多个阶段的信号动态时。电源不需要主动补偿以保持相电流平衡。实验证明的电源提供10 MHz大信号带宽,> 40A /μSEC电流转换速率,开关频率高达15 MHz,效率为95%。供应适用于2载波WCDMA和LTE手机基站。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号