A Noise-shaping SAR Assisted MASH 2-1 Sigma-Delta Modulator

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

1 Citation (Scopus)

Abstract

This paper presents a noise-shaping SAR assisted MASH 2-1 sigma-delta modulator (SDM). To implement a SDM with high resolution and high speed, the resolution of the quantizer and the noise-shaping order must rise with a low oversampling ratio (OSR). Based on the proposed MASH structure, the noise-shaping order can be raised, and also the number of OPAMPs and the mismatch effect among different stages can be reduced. Furthermore, two quantizers in the proposed MASH structure are combined into a noise-shaping quantizer for easy implementation. The proof-of-concept prototype was fabricated in TSMC 90-nm CMOS technology. At 1.0V supply, sampling rate of 80-MS/s, bandwidth of 3.333 MHz, the prototype achieves 71.44 dB SNDR. Besides, the slope of it verifies the almost 3rd noise-shaping successfully.

Original languageEnglish
Title of host publication2020 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728160832
DOIs
Publication statusPublished - 2020 Aug
Event2020 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2020 - Hsinchu, Taiwan
Duration: 2020 Aug 102020 Aug 13

Publication series

Name2020 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2020

Conference

Conference2020 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2020
CountryTaiwan
CityHsinchu
Period20-08-1020-08-13

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Hardware and Architecture
  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality

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