Basic Theory and Applications for Next-Generation Power Amplifier Achieving High Power-Conversion Efficiency and Low Cost

本研究的目的是建立新一代功率放大器的开关技术的理论，以实现功率转换效率的提高和成本的降低。通过向主放大器注入谐波电流，可以实现开关管处电流和电压的平滑。此外，提出并实现了设计放大器的数值设计算法。通过对射频电源、DC-DC变换器、灯镇流器等具体应用的研究和开发，验证了所建立的理论和实现的设计工具的有效性。所开发的开关技术是相当有效的，因为它的功率转换效率的提高和成本的降低，并预计将被用作许多应用在电子领域。

The purpose of this research is to establish the theory of a switching technique for next-generation power amplifiers, which achieves both power-conversion efficiency enhancement and cost reduction. By applying injection current with harmonics frequency to main amplifier, it is possible to achieve smooth current and voltage at the switches. Additionally, numerical design algorithm for designing the amplifiers was proposed and implemented. Through the research and development of the concrete applications, such as RF power source, dc-dc converter, and lamp ballast, the validities of the established theory and the implemented design tool could be shown. The developed switching techniques is quite effective because of its power-conversion efficiency enhancement and cost reduction and is expected to be used as many applications in the electronics field.