• DocumentCode
    1355681
  • Title

    Ultra-low-noise CMOS current preamplifier from DC to 1 MHz

  • Author

    Ferrari, Giorgio ; Farina, Marcello ; Guagliardo, F. ; Carminati, Marco ; Sampietro, Marco

  • Author_Institution
    Dip. di Elettron. e Inf., Politec. di Milano, Milan, Italy
  • Volume
    45
  • Issue
    25
  • fYear
    2009
  • Firstpage
    1278
  • Lastpage
    1280
  • Abstract
    An ultra-low-noise, DC-1 MHz, current preamplifier is presented featuring a matched double-MOS architecture around a low offset opamp to obtain bidirectional gain with a signal range from -40 to 30 nA. Current noise density reaches a value of 500 ??A/??Hz, equivalent to a 100 G?? resistor, giving a 1 pARMS noise in a 100 kHz band. The strictly equal operating point of all transistors ensures excellent linearity even at femtoAmpere input current.
  • Keywords
    CMOS integrated circuits; MOSFET; low noise amplifiers; operational amplifiers; preamplifiers; current noise density; femtoAmpere input current; matched double-MOS architecture; offset operational amplifier; resistor; ultra-low-noise CMOS current preamplifier;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el.2009.2353
  • Filename
    5353332
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1355681