一个简单的d类音频功率放大器，使用无源CT ΣΔ调制器，用于中等质量音响系统

2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES) Pub Date : 2015-06-25 DOI:10.1109/MIXDES.2015.7208582

J. D. Melo, Pedro V. Leitão, J. Goes, N. Paulino

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引用次数: 0

摘要

本文介绍了一种使用二阶无源σ - δ调制器的中等质量音响系统的d类功率放大器(ΣΔM)。ΣΔM控制一个由h桥组成的输出功率级。采用基于遗传算法的优化程序设计了ΣΔM的环路滤波器，该优化程序考虑了多个参数。该系统采用离散元件实现，实验结果表明，在峰值信噪比(SNDR)为54 dB的情况下，实现了75 dB的DR。

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A simple class-D audio power amplifier using a passive CT ΣΔ modulator for medium quality sound systems

This paper presents a class-D power amplifier for medium quality sound systems using a second-order passive sigma-delta modulator (ΣΔM). The ΣΔM controls an output power stage consisting of a H-bridge. The loop filter of the ΣΔM was designed using a optimization procedure based on genetic algorithm (GA), that takes into account several parameters. This system was implemented using discrete components and the experimental results show that a DR of 75 dB is achieved with a peak signal-to-noise-plus-distortion ratio (SNDR) of 54 dB.

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2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)

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