• DocumentCode
    3848620
  • Title

    SCTF loop for noise reduction in Autozero amplifiers

  • Author

    G. Costa;N. Gimenez;A. Arnaud;M. Miguez

  • Author_Institution
    Department of Electrical Engineering, Catholic University of Uruguay, Montevideo CP 11700, Uruguay
  • Volume
    46
  • Issue
    18
  • fYear
    2010
  • fDate
    9/1/2010 12:00:00 AM
  • Firstpage
    1256
  • Lastpage
    1257
  • Abstract
    The use of a lowpass switched continuous time filter (SCTF) in the noise cancellation loop of an Autozero amplifier to reduce the white noise aliasing effect at low frequencies is presented. The SCTF limits only the bandwidth of the sampled noise, not the bandwidth of the amplifier. Time domain simulations showing the effect of the SCTF-Autozero on both flicker and white noise are presented, as well as a designed low-noise electroencephalography (EEG) amplifier (DC - 150 Hz) that takes advantage of the proposed technique for a 40- reduction of its input rms noise voltage.
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el.2010.1456
  • Filename
    5567043
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3848620