Study of Harmonic Suppression Method Based on the Class D Amplifier

Yu Guo; Wei Li

doi:10.4028/www.scientific.net/AMM.273.384

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 273Study of Harmonic Suppression Method Based on the...

Study of Harmonic Suppression Method Based on the Class D Amplifier

Abstract:

Class D power amplifier has the advantages of simple structure, small volume, high efficiency, large output power, and small distortion, therefore is applied widely in the audio power amplifier integrated circuit. But because of existing higher harmonic components, the total harmonic distortion (THD) is high. In this paper, for the characteristics of class D amplifier, a feed-forward control circuit is added to the amplifier output terminal, and a composite filter is used to inhibit output harmonics further. The simulation results show that, the method can reduce the system THD effectively and improve the performance of the amplifier.

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Periodical:

Applied Mechanics and Materials (Volume 273)

Pages:

384-388

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.273.384

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Online since:

January 2013

Authors:

Yu Guo, Wei Li

Keywords:

Class D Amplifier, Harmonic, MATLAB Simulation

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