A 4-μW Bandwidth/Power Scalable Delta-Sigma Modulator Based on Swing-Enhanced Floating Inverter Amplifiers

Menglian Zhao, Yibo Zhao, Huajun Zhang, Yaopeng Hu, Yuanxin Bao, Le Ye, Wanyuan Qu, Zhichao Tan*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)
15 Downloads (Pure)

Abstract

This article presents a fully dynamic scalable switched-capacitor delta-sigma modulator that achieves a 94.1-dB dynamic range (DR). Power-and- bandwidth scalability by only changing the clock frequency is achieved using a capacitively biased and swing-enhanced floating inverter operational transconductance amplifier (OTA). Fabricated in a 180-nm CMOS process, the prototype achieves an signal-to-noise-and-distortion ratio (SNDR) of >87 dB across 4× scaling from 100 to 400 kHz of the sampling frequency f_ S. At 200-kHz f_ S , it achieves an SNDR/DR of 89.3/94.1 dB while consuming 4 μ W , leading to a DR-based Schreier figure of merit (FoM) of 177.1 dB.

Original languageEnglish
Article number9607020
Pages (from-to)709-718
Number of pages10
JournalIEEE Journal of Solid-State Circuits
Volume57
Issue number3
DOIs
Publication statusPublished - 2022

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Bandwidth (BW) scalable
  • high resolution
  • ultra-low power

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