December 2014
Intermediate to advanced
688 pages
18h 19m
English
Content preview from RF Power Amplifier, 2nd Edition
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Chapter 7Class DE RF Power Amplifier
7.1 Introduction
The Class DE RF switching-mode power amplifier [1–17], also called the Class DZVS RF power amplifier, consists of two transistors, series-resonant circuit, and shunt capacitors connected in parallel with the transistors. It combines the properties of low voltage stress of the Class D power amplifier and zero-voltage switching (ZVS) of the Class E power amplifier. Switching losses are zero in the Class DE power amplifier, yielding high efficiency. In the Class DE power amplifier, the transistors are driven in such a way that there are time intervals (dead times) when both transistors are OFF. In this chapter, we present the circuit of the Class DE amplifier and its principle of operation, analysis, and design procedure.
7.2 Analysis of Class DE RF Power Amplifier
A circuit of the Class DE RF power amplifier is depicted in Fig. 7.1. It consists of two transistors 
and 
, series-resonant circuit 
, and shunt capacitors 
and 
connected ...
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