• DocumentCode
    1156839
  • Title

    Optimum Noise Figure of Transistor Amplifiers

  • Author

    Gardner, F.

  • Volume
    10
  • Issue
    1
  • fYear
    1963
  • fDate
    3/1/1963 12:00:00 AM
  • Firstpage
    45
  • Lastpage
    48
  • Abstract
    Noise figure of transistor amplifiers is commonly optimized by transforming of source impedance. Where transformers are not feasible, this method is inapplicable. This paper shows that noise figure can also be optimized by proper adjustment of emitter current with the source impedance remaining fixed. Moreover, for a rather wide range of source impedances, transformation affords very little noise improvement once the current has been optimized. Circuit design equations and curves are presented.
  • Keywords
    Circuit noise; Equivalent circuits; Impedance; Low-frequency noise; Noise figure; Semiconductor device noise; Senior members; Signal to noise ratio; Thermal resistance; Transformers;
  • fLanguage
    English
  • Journal_Title
    Circuit Theory, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9324
  • Type

    jour

  • DOI
    10.1109/TCT.1963.1082067
  • Filename
    1082067
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1156839