• DocumentCode
    909305
  • Title

    On the definition of the cutoff frequency fT

  • Author

    Gummel, H.K.

  • Volume
    57
  • Issue
    12
  • fYear
    1969
  • Firstpage
    2159
  • Lastpage
    2159
  • Abstract
    The commonly used definition of cutoff frequency fTof bipola transistors is predicated on the existence of a frequency domain in which the magnitude of the current gain β varies inversely with frequency. In the absence of such a domain, the definition is vague. The definition 1/fT= d/df[lm (1/β)] for f →0 is proposed.
  • Keywords
    Bipolar transistors; Cutoff frequency; Delay effects; Doping profiles; Equations; Frequency dependence; Frequency domain analysis; Frequency measurement; Geometry;
  • fLanguage
    English
  • Journal_Title
    Proceedings of the IEEE
  • Publisher
    ieee
  • ISSN
    0018-9219
  • Type

    jour

  • DOI
    10.1109/PROC.1969.7509
  • Filename
    1449439
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=909305