Analysis of the Inter-Stage Signal Leakage in Wide BW Low OSR and High DR CT MASH ΔΣM

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Abstract

This paper analyzes the error mechanisms that limit the dynamic range (DR) of wide-bandwidth, low-OSR continuous-time (CT) multi-stage noise-shaping (MASH) ΔΣM and proposes a tool, the Signal Leakage Function (SLF), to optimize the architecture, and hence improving DR. The SLF provides new insights on finding the key parameters which influence the inter-stage signal leakage and thus the inter-stage gain (IG). These insights would lead not only to increasing the overall dynamic range in a very power-efficient way, but also decreasing the performance sensitivity to mismatches and other variations.
Original languageEnglish
Title of host publication2020 IEEE International Symposium on Circuits and Systems (ISCAS)
PublisherInstitute of Electrical and Electronics Engineers
Number of pages5
ISBN (Print)978-1-7281-3320-1
DOIs
Publication statusPublished - 28 Sep 2020
Event2020 IEEE International Symposium on Circuits and Systems (ISCAS 2020) - Sevilla, Spain
Duration: 10 Oct 202021 Oct 2020

Conference

Conference2020 IEEE International Symposium on Circuits and Systems (ISCAS 2020)
Country/TerritorySpain
CitySevilla
Period10/10/2021/10/20

Keywords

  • signal leakage function
  • continuous-time Delta Sigma Modulator
  • Multi-stage noise-shaping Delta Sigma Modulator
  • Analog-to-Digital Converters
  • Sigma-Delta ADC

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