Abstract
This chapter presents the different configurations of Class-D power amplifiers—the increased efficiency of which is a result of employing the active device as switches. The switched-mode power amplifiers with resistive load of different configurations, which can be considered driver power amplifiers, are discussed. The current-switching and voltage-switching configurations based on complementary and transformer-coupled topologies are analyzed. The effect of the saturation resistance, rectangular and sinusoidal driving signals, finite transition time, and parasitic shunt capacitance and series inductance is demonstrated. The practical design examples of voltage-switching and current-switching Class-D power amplifiers intended to operate at high frequencies and microwaves are described in the chapter.
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