带True TI NS量化器的81.6dB SNDR 15.625MHz BW三阶CT SDM

2022 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits) Pub Date : 2022-06-12 DOI:10.1109/vlsitechnologyandcir46769.2022.9830207

Seungjong Lee, Taewook Kang, Seungheun Song, Kyumin Kwon, Michael J. Flynn

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引用次数: 1

摘要

本文提出了一种带时间交错(TI)噪声整形(NS)量化器(QTZ)的连续时间(CT) σ δ调制器(SDM)。NS QTZ操作的完全并行化放松了环路滤波和剩余积分，并实现了高(6位)QTZ分辨率。28nm CMOS原型在500MS/s时消耗6.4mW。在15.625MHz带宽下，实测SNDR为81.6dB。对应的Schreier FoMSNDR为175.5dB。

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An 81.6dB SNDR 15.625MHz BW 3rd Order CT SDM with a True TI NS Quantizer

This paper presents a continuous-time (CT) sigma-delta modulator (SDM) with a time-interleaved (TI) noise-shaping (NS) quantizer (QTZ). Complete parallelization of the NS QTZ operations relaxes loop filtering and residue integration and enables a high (6-bit) QTZ resolution. The 28nm CMOS prototype consumes 6.4mW at 500MS/s. The measured SNDR is 81.6dB for a 15.625MHz bandwidth. The corresponding Schreier FoMSNDR is 175.5dB.

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2022 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits)

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