• DocumentCode
    874726
  • Title

    Time Variant Preamplification for Low Current Measurements

  • Author

    Maranesi, P. ; Varoli, V.

  • Author_Institution
    Institute of Nuclear Engineering, Politecnico di Milano via Ponzio 34/3, 20133 Milano, Italy
  • Volume
    31
  • Issue
    5
  • fYear
    1984
  • Firstpage
    1039
  • Lastpage
    1044
  • Abstract
    An ion chamber current meter spanning seven decades from 10 fA to .1 ¿A is described. It is based upon a current-to-width conversion technique implemented by a gated-integrator preamplifier. Performing automatic offset and bias current adjustments, it achieves a particularly long-term service-free operation. A complete analysis of its noise is made; signal-to--noise optimization is attained by means of a self--adapting filter.
  • Keywords
    Bandwidth; Bridge circuits; Circuit noise; Current measurement; Filters; Phase measurement; Preamplifiers; Signal analysis; Time measurement; Voltage;
  • fLanguage
    English
  • Journal_Title
    Nuclear Science, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9499
  • Type

    jour

  • DOI
    10.1109/TNS.1984.4333437
  • Filename
    4333437