A 94.1 dB DR 4.1 nW/Hz Bandwidth/Power Scalable DTDSM for IoT Sensing Applications Based on Swing-Enhanced Floating Inverter Amplifiers

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

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

4 Citations (Scopus)

Abstract

IoT sensing applications operating from batteries or harvested energy require microwatt data converters. To accurately measure small signals, they often need to achieve a high DR (>90dB) and better linearity than the transducers themselves (>14b) with a BW in the kHz range. IoT systems also often consist of multiple sensing modalities with different BW requirements and are often heavily duty-cycled to reduce power consumption. This paper presents a fully dynamic discrete-time delta-sigma modulator (DTDSM) that supports 4x bandwidth/power scaling without any programming overhead except for changing fs, using a capacitively biased swing-enhanced floating inverter amplifier (SEFIA). The prototype, fabricated in 180nm CMOS, consumes only 4μW at 800Hz BW and achieves >87dB SNDR over 2 octaves of fs, between 100 kHz and 400 kHz, and a DR of 94.1 dB while operating with an OSR of 125.

Original languageEnglish
Title of host publication2021 IEEE Custom Integrated Circuits Conference, CICC 2021 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages2
ISBN (Electronic)978-1-7281-7581-2
DOIs
Publication statusPublished - 2021
Event2021 IEEE Custom Integrated Circuits Conference, CICC 2021 - Virtual, Austin, United States
Duration: 25 Apr 202130 Apr 2021

Publication series

NameProceedings of the Custom Integrated Circuits Conference
Volume2021-April
ISSN (Print)0886-5930

Conference

Conference2021 IEEE Custom Integrated Circuits Conference, CICC 2021
Country/TerritoryUnited States
CityVirtual, Austin
Period25/04/2130/04/21

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