A 110-dB Dynamic Range, 76-dB Peak SNR Companding Continuous-Time ?S Modulator for Audio Applications

2012 25th International Conference on VLSI Design Pub Date : 2012-01-07 DOI:10.1109/VLSID.2012.45

Saravana Kumar, S. Chatterjee

引用次数: 2

Abstract

This paper presents a companding continuous-time ΔΣ ADC for audio applications. The 3rd-order modulator uses a 3-bit companding quantizer and has an over sampling rate of 64. The companding quantizer is implemented by a log amplifier followed by a flash ADC. The modulator, in simulation, achieves a peak signal-to-noise ratio of 76 dB, a dynamic range of 110 dB in a 24 kHz bandwidth and dissipates 860 μW of power.

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一个110 db动态范围，76 db峰值信噪比压缩音频应用连续时间调制器

本文提出了一种用于音频应用的扩展连续时间ΔΣ模数转换器。三阶调制器采用3位压缩量化器，过采样率为64。压缩量化器由一个对数放大器和一个闪存ADC实现。仿真结果表明，该调制器在24 kHz带宽下的峰值信噪比为76 dB，动态范围为110 dB，功耗为860 μW。

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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来源期刊

2012 25th International Conference on VLSI Design

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