一种新的sigma-delta音频功率放大器拓扑结构

2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512) Pub Date : 2004-05-23 DOI:10.1109/ISCAS.2004.1329947

Antonio Zorzano Martínez, Fernando Beltrán Blázquez, José Ramón Beltrán Blázquez

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引用次数: 2

摘要

提出了一种基于高频功率转换和σ - δ调制的逆变器拓扑结构。在音频功率放大领域，σ - δ技术尤其具有吸引力。对该技术进行了分析。功率调制是一种获得比传统线性功率放大器效率更高的功率放大器的方法。集成了一个具有σ - δ调制输入的准谐振变换器，以减少开关损耗，允许高频工作。将音频功率放大器和隔离式大功率电源集成于一体，并进行了分析。通过仿真验证了分析结果。

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A new topology for a sigma-delta audio power amplifier

An 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 linear 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 analyzed. Simulations are performed to backup the analysis.

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来源期刊

2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512)

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