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All-Digital Power Amplifier Based on Pulse-Width Modulation

An all-digital power amplifier capable of driving a loudspeaker at high-power levels is analyzed and implemented. The amplifier is based on linearized pulse-width modulation (LPWM). The LPWM amplifier has an efficiency of >90% at eight-times oversampling. It is shown that the distortion generated by the output stage limits the system performance. The LPWM amplifier is compared with a Sigma-Delta modulator based amplifier.

 

Author (s): Pedersen, M. S.; Shajaan, M.
Affiliation: Laboratory of Industrial Electronics, Technical University of Denmark, Lyngby, Denmark ; Electronics Institute, Technical University of Denmark, Lyngby, Denmark (See document for exact affiliation information.)
AES Convention: 96 Paper Number:3809
Publication Date: 1994-02-06 Import into BibTeX
Session subject: Implementation of Digital Audio Systems
Permalink: https://aes2.org/publications/elibrary-page/?id=6423


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Type: Convention Paper
E-Libary location: (CD aes13) PP9496/PP9402/
16938
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