A voltage scaling 0.25-1.8 v delta-sigma modulator with inverter-opamp self-configuring amplifier

Kentaro Yoshioka, Yosuke Toyama, Teruo Jyo, Hiroki Ishikuro

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A 2nd order discrete time (DT) ΔΣ modulator with very wide supply voltage range of 0.25-1.8 V is presented. An inverter-opamp self-configuring amplifier (IOSA) is proposed with sufficient gain through sub-threshold to strong inversion region. The amplifier senses the supply voltage and automatically configures either to operate as an inverter or an opamp. The prototype ADC fabricated in 180nm CMOS achieved SNDR of 53dB at a supply voltage of 0.3V and a best FoM of 0.09 pJ/step. At 1.8 V supply the modulator achieves SNDR 61dB and operates down to 0.25V.

Original languageEnglish
Title of host publication2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013
Pages809-812
Number of pages4
DOIs
Publication statusPublished - 2013
Event2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013 - Beijing, China
Duration: 2013 May 192013 May 23

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
ISSN (Print)0271-4310

Other

Other2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013
CountryChina
CityBeijing
Period13/5/1913/5/23

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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