Pedro V. Leitão

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This paper presents a full-bridge discrete power output stage for a Class D audio amplifier using a single-ended power supply. The circuit receives a digital control signal with 5 V of amplitude and it generates a floating differential output voltage up to 20 V of amplitude from a single 20 V power supply voltage. Using as control signal a pulse density(More)
This paper presents a class-D power amplifier for medium quality sound systems using a second-order passive sigma-delta modulator (ΣΔM). The ΣΔM controls an output power stage consisting of a H-bridge. The loop filter of the ΣΔM was designed using a optimization procedure based on genetic algorithm (GA), that takes(More)
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