An exact analysis of Class-DE amplifier at any output Q
An exact analysis of Class-DE amplifier at any output Q
复制标题
对任意输出 Q 的 DE 类放大器进行精确分析
DOI：
10.1109/81.795836
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发表时间：
1999
影响因子：
5.1
通讯作者：
M. Albulet
中科院分区：
文献类型：
--
作者：
M. Albulet
先前有关 DE 类功率放大器的论文基于这样的假设：串联调谐电路的 Q 因数足够高，使得负载电流为正弦波。本文提出了 DE 类功率放大器的理论描述，其中消除了无限 Q 的假设。给出并讨论了设计和性能曲线，并介绍了与先前已知结果的比较、实际的调谐过程以及 DE 类电路的实际限制。这种分析很有用，因为低 Q 电路适用于输出谐波含量不重要的应用，例如，在高效 DC/DC 转换器中，为加热提供 RF 能量，用于生成等离子体、电弧或火花，用于通信干扰，或用于较高功率级的输入驱动器。实验结果与理论预测非常吻合。
Previous papers on Class-DE power amplifiers are based on the assumption that the Q factor of the series-tuned circuit is high enough that the load current is sinusoidal. This paper presents a theoretical description of the Class-DE power amplifier in which the assumption of infinite Q is eliminated. Design and performance curves are given and discussed and a comparison with the previous known results, a practical tuning procedure, and practical limitations of the Class-DE circuit are also presented. Such an analysis is useful because low-Q circuits are appropriate for applications in which the harmonic content of the output is not important, e.g., in high-efficiency DC/DC converters, in providing RF energy for heating, for generation of plasmas, arcs, or sparks, for communications jamming, or for input driver to a higher power stage. Experimental results closely agree with the theoretical predictions.