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Switchmode RF and Microwave Power Amplifiers, 2nd Edition by Marc J Franco, Nathan O. Sokal, Andrei Grebennikov

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Chapter 5

Class-E with Shunt Capacitance

Introduction

The switchmode Class-E power amplifiers with shunt capacitance have found widespread application due to their design simplicity and high-efficiency operation. Their load-network configuration consists of a shunt capacitor, a series inductor, and a series filter tuned to the fundamental frequency to provide a high level of harmonic suppression. In the Class-E power amplifier, the transistor operates as an on-to-off switch, and the shapes of the current and voltage waveforms provide a condition in which the high current and the high voltage do not occur simultaneously. That minimizes the power dissipation and maximizes the power-amplifier efficiency. In this chapter, the historical aspect ...

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