Some non-linear amplifier topologies are capable of providing a larger voltage gain than one from a DC source, which could make them suitable for various applications. However, the non-linearities introduce a significant amount of harmonic distortion (THD). Some of this distortion could be reduced using predistortion. This paper suggests linearizing a nonlinear bidirectional Cuk audio amplifier using an analog predistortion approach. A prototype power stage was built and results show that a voltage gain of up to 9 dB and reduction in THD from 6% down to 3% was obtainable using this approach.

Authors: Birch, Thomas Haagen; Nielsen, Dennis; Knott, Arnold; Andersen, Michael A. E.
Affiliation: Technical University of Denmark, Kgs. Lyngby, Denmark
AES Convention: 137 (October 2014) Paper Number: 9192
Publication Date: October 8, 2014 Import into BibTeX
Subject: Signal Processing
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=17515

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