A new Topology for a Sigma Delta Audio Power Amplifier

  1. Zorzano Martínez, A. 1
  2. Beltrán Blázquez, F. 2
  3. Beltrán Blázquez, J.R. 2
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 Universidad de Zaragoza
    info

    Universidad de Zaragoza

    Zaragoza, España

    ROR https://ror.org/012a91z28

Libro:
Proceedings - IEEE International Symposium on Circuits and Systems

ISBN:

Año de publicación: 2004

Volumen: 5

Páginas: V-872-V-875

Tipo: Capítulo de Libro

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SCOPUS: 2-s2.0-4344708917 WoS: WOS:000223103900218 GOOGLE SCHOLAR

Resumen

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.