A 235mW CT 0-3 MASH ADC Achieving -167dBFS/Hz NSD with 53MHz BW

📋 论文概要

该论文提出了一种0-3连续时间MASH ADC，用于无线通信基础设施，在53MHz带宽内实现了-167dBFS/Hz的噪声谱密度，功耗仅235mW，比传统指标低10dB噪声，解决了LTE-A等标准对高带宽低噪声ADC的需求。

💡 主要创新点

• 采用0-3 MASH架构结合连续时间实现，在宽带宽内获得极低噪声密度。
• 通过优化设计使ADC噪声谱密度达到-167dBFS/Hz，比传统要求低10dB，同时保持低功耗。
• 实现了235mW功耗下53MHz带宽，满足LTE-A等基站接收机需求。

🏷 关键词

📄 原文摘要

ADCs in wireless communication infrastructure is increased bandwidth with little or no relaxation in noise density or power consumption. The historical expectation of system designers is a noise spectral density (NSD) of -157dBFS/Hz with a power consumption of 0.5W. This expectation is a difficult one to meet with existing ADC architectures when the system bandwidth is 100MHz as demanded by standards such as LTE-A. The 0-3 continuous-time (CT) MASH [1-2] ADC described in this paper allows a direct-conversion receiver with the requisite bandwidth to be constructed, with 10dB lower noise than established benchmarks. As shown in Fig. 29.2.1, the ADC consists of two stages: a residue-producing front end and a third-order feed-forward CT ΔΣ back end. The front end consists

👥 作者与机构

Yunzhi Dong1, Richard Schreier1, Wenhua Yang2,

Sudhir Korrapati2, Ali Sheikholeslami1,3 Analog Devices, Toronto, ON, Canada, Analog Devices, Wilmington, MA, 3 University of Toronto, Toronto, ON, Canada 1 2 The trend for