Switch-mode power amplifiers has become the conventional choice for audio applications due to their superior efficiency and excellent audio performance. These amplifiers rely on high frequency modulation of the audio input. Conventional modulators use a fixed high frequency for modulation. Self-oscillating modulators do not have a fixed modulation frequency and can provide good audio performance with very simple circuitry. This paper proposes a new type of self-oscillating modulator. The proposed modulator is compared to an already existing modulator of similar type and their performances are compared both theoretically and experimentally. The result shows that the proposed modulator provides a higher degree of linearity resulting in around 2% lower Total Harmonic Distortion (THD).

Authors: Dahl, Nicolai; Iversen, Niels Elkjær; Knott, Arnold; Andersen, Michael A. E.
Affiliation: Technical University of Denmark, Kgs. Lyngby, Denmark
AES Convention: 140 (May 2016) Paper Number: 9562
Publication Date: May 26, 2016 Import into BibTeX
Subject: Audio Signal Processing: Audio Applications
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=18260

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD 140Papers)   /conv/140/9562.pdf

Start a discussion about this paper!