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Digital Signal Processing Circuits for Digital Class-D Power Amplifiers

  • Krzysztof SozańskiEmail author
Chapter
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Part of the Power Systems book series (POWSYS)

Abstract

This Chapter considers digital signal processing circuits for the digital class-D power amplifier. Special attention is paid to the high quality audio power amplifier. In the digital class-D audio amplifier the dynamics should reach 120 dB, which results in high requirements for the algorithm used and its digital realization. The author proposes a modulator with a noise shaping circuit for the class-D amplifier. Audio signal interpolators are also considered, that allow for an increase in sampling frequency whilst maintaining a substantial separation of signal from noise. The author also presents an original analog power supply voltage fluctuation compensation circuit for the class-D amplifier. The problems of loudspeaker measurements are considered in this Chapter too. The class-D amplifier with digital click modulation is considered as well. Finally, two-way and three-way loudspeaker systems, designed by the author, are presented, for which an input to output signal is digitally processed.

Keywords

Filter Bank Finite Impulse Response Pulse Width Modulator Digital Signal Processor Duty Ratio 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag London Ltd. 2017

Authors and Affiliations

  1. 1.Institute of Electrical EngineeringUniversity of Zielona GóraZielona GóraPoland

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