用于低功耗音频应用的112dB SNDR Delta-Sigma调制器

2021 14th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI) Pub Date : 2021-10-23 DOI:10.1109/CISP-BMEI53629.2021.9624444

Lvkun Qian, Shengxi Diao

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引用次数: 1

摘要

本文提出了一种用于音频应用的离散四阶单比特δ - σ调制器。该调制器采用0.18 um CMOS技术，采用全差分开关电容级联积分器反馈(CIFB)架构。该调制器在20khz信号带宽下，采样频率为5.12MHz，峰值信噪比(SNDR)为112 dB。所提出的调制器核心在1.8 V电源电压下的功耗为3.9 mW。

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A 112dB SNDR Delta-Sigma Modulator for Low-Power Audio Applications

This paper presents a discrete-time fourth-order single-bit delta-sigma modulator for audio applications. The modulator is implemented in 0.18 um CMOS technology using fully differential switch-capacitor cascade of integrators feedback (CIFB) architecture. The modulator achieves a 112 dB peak Signal to Noise and Distortion Ratio (SNDR) in 20-kHz signal bandwidth with a sampling frequency of 5.12MHz. The power consumption of the proposed modulator core is 3.9 mW at a supply voltage of 1.8 V.

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2021 14th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)

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