Characterisation of an EMI-Improved Integrated Folded Cascode Amplifier Structure Using the EMIRR Measurement Method

Dominik Zupan*, Nikolaus Czepl, Bernd Deutschmann

*Corresponding author for this work

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

Abstract

In this paper, we analyse the robustness of operational amplifiers (OpAmps) against electromagnetic interference (EMI). Therefore we compare a standard folded cascode amplifier structure with an EMI-improved amplifier structure introducing a cross-coupled double differential input pair. We perform measurements on the manufactured test chip structures to determine general characteristics (gain, offset, gain-bandwidth product (GBWP) and phase margin), as well as EMI-related characteristics (EMI-induced offset respectively electromagnetic interference rejection ratio (EMIRR)). Based on these characteristics, we compare both structures with regard to their performance. Further on, we put the measurements into relation with our previous findings that we obtained from simulation.
Original languageEnglish
Title of host publication2024 14th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)
PublisherIEEE
Number of pages4
ISBN (Electronic)979-8-3315-0463-2
ISBN (Print)979-8-3315-0464-9
DOIs
Publication statusPublished - Oct 2024
Event14th International Workshop on the Electromagnetic Compatibility of Integrated Circuits, EMC Compo 2024 - Torino, Italy, Turin, Italy
Duration: 7 Oct 20249 Oct 2024

Conference

Conference14th International Workshop on the Electromagnetic Compatibility of Integrated Circuits, EMC Compo 2024
Abbreviated titleEMC Compo
Country/TerritoryItaly
CityTurin
Period7/10/249/10/24

Keywords

  • electromagnetic interference (EMI)
  • operational amplifier
  • emi-induced offset
  • folded cascode
  • compensation
  • cross-coupled differential pair
  • emi mitigation

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