• DocumentCode
    1359838
  • Title

    Temperature compensation of Gm-C filters using resistive bridge

  • Author

    Moradi, Amir ; Raut, Rahul ; Cowan, Glenn E. R.

  • Author_Institution
    Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, QC, Canada
  • Volume
    45
  • Issue
    18
  • fYear
    2009
  • Firstpage
    921
  • Lastpage
    923
  • Abstract
    A new technique for temperature compensation of Gm-C filters is presented. Using negative feedback the Gm-cells´ transconductance is locked to the reciprocal of a resistance array. Temperature dependency of the Gm/C ratio, which determines the unity-gain frequency, is minimised by arranging the temperature dependency of the resistors. Unique properties of a proposed resistive bridge allow for the synthesis of temperature coefficients beyond the range of coefficients of constituent elements. With a set of practical elements a variation of only 0.66% in Gm/C has been achieved over -40 to 120degC.
  • Keywords
    feedback; filters; resistors; Gm-C filters; Gm-cells transconductance; negative feedback; resistance array; resistive bridge; temperature -14 degC to 120 degC; temperature compensation; temperature dependency; unity-gain frequency;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el.2009.1637
  • Filename
    5226988
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1359838