A higher-order programmable amplitude and timing error shaping bandpass DEM for nyquist-rate D/A converters

Shantanu Mehta, Brendan Mullane, Vincent O'Brien, Roberto Pelliconi, Christophe Erdmann

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents a programmable amplitude and timing error shaping bandpass dynamic-element-matching (DEM) for Nyquist-rate D/A converters. Amplitude and timing-skew errors are shaped using two different loop-filters employed within the DEM structure. The systematic-duty-cycle errors are eliminated from the DAC spectrum using a controlled set of 'ON' transitions for any choice of the input-signal over the Nyquist band. The loop-filter order within the DEM can be selected to 2, 4 or 6 and the DAC errors can be shaped over a narrow or wide band for any choice of center-frequency. This work demonstrates that for a 12-bit segmented Nyquist DAC (5T-7B), the in-band SFDR and IMD3 is ≥80dBs for the DEM configurations.

Original languageEnglish
Title of host publication2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728192017
DOIs
Publication statusPublished - 2021
Event53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Daegu, Korea, Republic of
Duration: 22 May 202128 May 2021

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2021-May
ISSN (Print)0271-4310

Conference

Conference53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021
Country/TerritoryKorea, Republic of
CityDaegu
Period22/05/2128/05/21

Keywords

  • Amplitude/timing errors
  • Bandpass
  • DEM
  • Nyquist-DAC
  • Programmable

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