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E类调谐功率放大器是由一个负载网络和一个晶体管(在输出频率上作开关使用)组成。而最简单的负载网络又是由一只与晶体管相并联的电容器和一个有剩余电抗的串联调谐输出电路所构成的。电路的工作当晶体管导通时取决于晶体管,当晶体管截止时取决于负载网络的暂态特性。放大器运行的基本方程是用富氏分析和高Q值的假设来推导。因此,这些方程通常是用来确定最佳运用(效率为100％)时的元件直。其次也用来确定效率为100％时占空度和元件值的一组最佳参数。本文还分析了集电极电压波形的谐波结构,和讨论了E类放大器的其它组态。这些分析可以直接用来指导设计高效率的功率放大器,同时对深入理解最新固态甚高频(VHF)和超高频(UHF)调谐功率放大器工作原理也提供了有效的帮助。
Class E tuned power amplifiers consist of a load network and a transistor that switches at the output frequency. The simplest load network is composed of a capacitor in parallel with the transistor and a series tuned output circuit with residual reactance. The operation of the circuit depends on the transistor when the transistor is on, depending on the transient nature of the load network when the transistor is off. The basic equations for the operation of the amplifier are derived from the Fourier analysis and the assumption of a high Q value. Therefore, these equations are usually used to determine the best use of components (efficiency of 100%) straight component. Second, it is also used to determine the efficiency of 100% duty cycle and component values of a set of the best parameters. This paper also analyzes the harmonic structure of the collector voltage waveform and discusses other configurations of class E amplifiers. These analyzes can be used directly to guide the design of efficient power amplifiers, as well as to provide insight into how the latest solid-state VHF and UHF tuned power amplifiers work.