一个0.18µm CMOS， - 92 db THD, 105 dba DR，三阶音频d类放大器

2013 Proceedings of the ESSCIRC (ESSCIRC) Pub Date : 2013-10-31 DOI:10.1109/ESSCIRC.2013.6649099

D. Cartasegna, P. Malcovati, L. Crespi, A. Baschirotto

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引用次数: 2

摘要

本文提出了一种采用0.18 μm CMOS技术实现的三阶音频d类放大器，在静态电流为2 mA的情况下，总谐波失真(THD)为-92 dB，动态范围(DR)为105 dBA。该电路在4-Ω负载下提供高达2.4 W的功率，峰值效率为88%。得益于三阶环路滤波器的THD性能，使所提出的器件适用于高端音频应用，其中线性放大器仍然是主要解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A 0.18-µm CMOS, −92-dB THD, 105-dBA DR, third-order audio class-D amplifier

This paper presents a third-order audio class-D amplifier, implemented in a 0.18-μm CMOS technology, achieving -92 dB of total harmonic distortion (THD) and 105 dBA of dynamic range (DR) with a quiescent current of 2 mA. The circuit delivers up to 2.4 W on a 4-Ω load with a peak efficiency of 88%. The THD performance, achieved thanks to the third-order loop filter, makes the proposed device suitable for high-end audio applications, where linear amplifiers are still the dominant solution.

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2013 Proceedings of the ESSCIRC (ESSCIRC)

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