• DocumentCode
    2212752
  • Title

    Susceptibility of chopper OpAmps to EMI

  • Author

    Fiori, Franco

  • Author_Institution
    Electronics and Telecommunication Dpt., Politecnico di Torino, Italy
  • fYear
    2015
  • fDate
    16-22 Aug. 2015
  • Firstpage
    1018
  • Lastpage
    1021
  • Abstract
    This paper analyzes the effect of radio frequency interference (RFI) on the operation of high precision chopper operational amplifiers (chopper OpAmps), which are commonly used in sensor signal conditioning circuits. The rectification of RFI in continuous time differential input stages is discussed and the main outcomes of such analysis are used to explain the demodulation of RFI in chopper OpAmps. Finally, a new circuit topology based on chopped signals that shows high immunity to RFI is proposed.
  • Keywords
    Choppers (circuits); Electromagnetic compatibility; Electromagnetic interference; Logic gates; Nickel; Time-domain analysis;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Electromagnetic Compatibility (EMC), 2015 IEEE International Symposium on
  • Conference_Location
    Dresden, Germany
  • Print_ISBN
    978-1-4799-6615-8
  • Type

    conf

  • DOI
    10.1109/ISEMC.2015.7256306
  • Filename
    7256306
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2212752