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The Basics Of The Doherty Amplifier
8/4/2011
In this article, we will review the behavior of the Class-AB and Class-C amplifiers and then take a detailed look at how these two amplifier types can be combined to produce a system that preserves signal fidelity as well as boosts efficiency.
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Article: Amplifier Alphabet Soup: Part II, Basics Of Power Amplifier Classes D, E, F And Inverse-F
6/20/2011
Part I of this series summarized the operation of the classical limited conduction angle amplifier topologies (Class-A, AB, B, C). Switching amplifiers are given the class designators D, E, F and inverse F. Part II of this series will focus on a qualitative review of these amplifier class definitions as well as giving some explanation on where inefficiencies appear in each. Some of the advantages and disadvantages of each topology will be presented and the trade-offs will be briefly elaborated in an intuitive manner. By Bill Slade, Orban Microwave Products
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Article: Amplifier Alphabet Soup: Part I, Basics Of Power Amplifier Classes A, AB, B And C
2/18/2011
Modern RF and microwave engineers have many more types of amplifiers at their disposal to suit specific system needs than their predecessors ever dreamed of. Some are optimized for linearity, others for efficiency. Still other types compromise between the two. Classes of amplifiers can more or less be lumped into two groups: the classical controlled conduction angle amplifiers and the so-called "switching" amplifiers. The first group consists of the high-fidelity Class-A and AB operating modes, the class-B and the reduced conduction-angle Class-C amplifier. The switchers include Class-D, E, F and inverse F. By Bill Slade, Orban Microwave Products
