A new Topology for a Sigma Delta Audio Power Amplifier
- Zorzano Martínez, A. 1
- Beltrán Blázquez, F. 2
- Beltrán Blázquez, J.R. 2
-
1
Universidad de La Rioja
info
-
2
Universidad de Zaragoza
info
ISBN:
Year of publication: 2004
Volume: 5
Pages: V-872-V-875
Type: Book chapter
Abstract
A new inverter topology based on high frequency power conversion and Sigma-Delta modulation is proposed. Sigma-Delta technique is particularly an attractive idea in audio power amplifying area. Analysis of this technique is presented. Power modulation is a way to obtain power amplifiers with better efficiency than conventional lineal power amplifiers. A quasi-resonant converter with Sigma-Delta modulation input, has been integrated to reduce switching losses, allowing high frequency operation. Audio power amplifier and isolated high power supply are integrated in one unit and analysed. Simulations are performed to backup the analysis.