Applying bipolar transistors in dynamic power supply transmitters
Applying bipolar transistors in dynamic power supply transmitters
复制标题
双极型晶体管在动态电源发射器中的应用
DOI：
10.1109/bctm.2016.7738974
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
E. McCune
中科院分区：
文献类型：
--
作者：
E. McCune
动态电源发射机（DPST），包括包络跟踪（ET）和直接极调制（DP）技术，在一些应用中取得了一个世纪的成功。最初的动机是提高最终功率放大器（PA）的能量效率，今天仍然如此。这些方法可以提高跨宽信号和调谐带宽的整体能源效率。并非所有类型的晶体管在不同的DPST体系结构中表现都一样好。本文提供了DPST技术的快速回顾，然后研究了目前可用的双极晶体管如何应用于各种DPST选项。结论是双极晶体管目前更适合于ET而不是DP实现。测量证明并解释了这种差异。
Dynamic power supply transmitters (DPST), including the techniques of envelope tracking (ET) and direct polar (DP) modulation, have a century of success in some applications. The original motivation was to improve the energy efficiency of the final power amplifier (PA), and that remains true today. These are methods to improve overall energy efficiency across wide signal and tuning bandwidths. Not all transistor types perform equally well in the various DPST architectures. This paper provides a quick review of DPST techniques and then examines how the presently available bipolar transistors apply to the various DPST options. It is concluded that bipolar transistors are presently much more suitable for ET than for DP implementations. Measurements demonstrate and explain this difference.