Characterization of the RFI Rectification Behavior of Instrumentation Amplifiers

Chunyu Wu, Guanghua Li, David J. Pommerenke, Victor Khilkevich, Gary Hess

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem Konferenzband

Abstract

In this paper, the rectification behavior of popular in-amps (instrumentation amplifiers) is measured in both common- and single-ended RF noise injection modes. It is recommended that AD8221 be used in common mode RF noise injection environment, and AD8220 and AD8429 be used in single-ended RF noise injection environment. The mechanism of RF noise rectification inside in-amps is also discussed. It is verified that rectification mainly happens at the non-inverting input of two op-amps in the first stage of an in-amp. The DC voltage difference between inverting input and non-inverting input of the in-amp is further amplified, which will cause a large DC offset at the output. It is shown that symmetry of the first stage in an instrumentation amplifier is very important. The asymmetry of the first stage will increase the DC offset at the output dramatically.

Originalspracheenglisch
Titel2018 IEEE Symposium on Electromagnetic Compatibility, Signal Integrity and Power Integrity, EMC, SI and PI 2018
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers
ISBN (elektronisch)9781538666210
DOIs
PublikationsstatusVeröffentlicht - 17 Okt 2018
Extern publiziertJa
Veranstaltung2018 IEEE Symposium on Electromagnetic Compatibility, Signal Integrity and Power Integrity, EMC, SI and PI 2018 - Long Beach, USA / Vereinigte Staaten
Dauer: 30 Jul 20183 Aug 2018

Publikationsreihe

Name2018 IEEE Symposium on Electromagnetic Compatibility, Signal Integrity and Power Integrity, EMC, SI and PI 2018

Konferenz

Konferenz2018 IEEE Symposium on Electromagnetic Compatibility, Signal Integrity and Power Integrity, EMC, SI and PI 2018
LandUSA / Vereinigte Staaten
OrtLong Beach
Zeitraum30/07/183/08/18

ASJC Scopus subject areas

  • !!Safety, Risk, Reliability and Quality
  • !!Signal Processing
  • !!Energy Engineering and Power Technology
  • !!Electrical and Electronic Engineering

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  • Dieses zitieren

    Wu, C., Li, G., Pommerenke, D. J., Khilkevich, V., & Hess, G. (2018). Characterization of the RFI Rectification Behavior of Instrumentation Amplifiers. in 2018 IEEE Symposium on Electromagnetic Compatibility, Signal Integrity and Power Integrity, EMC, SI and PI 2018 [8495427] (2018 IEEE Symposium on Electromagnetic Compatibility, Signal Integrity and Power Integrity, EMC, SI and PI 2018). Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/EMCSI.2018.8495427