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.
Authors:
Pedersen, M. S.; Shajaan, M.
Affiliations:
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 (February 1994)
Paper Number:
3809
Publication Date:
February 1, 1994
Subject:
Implementation of Digital Audio Systems
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