• DocumentCode
    1195834
  • Title

    Comments on "Accurate Determination of Threshold Voltage levels of a Schmitt Trigger

  • Author

    Lauer, Hans-Ulrich

  • Volume
    34
  • Issue
    10
  • fYear
    1987
  • fDate
    10/1/1987 12:00:00 AM
  • Firstpage
    1252
  • Lastpage
    1253
  • Abstract
    It is shown that for an accurate determination of the two threshold voltages of a Schmitt trigger, the influence of the forward current amplification \\beta and the internal ohmic base and emitter resistors R_B and R_E of the transistors T_1 and T_2 may not be neglected. The hysteresis width of a real Schmitt trigger is smaller than calculated with the formula of Roy [1], because neither \\beta is infinite nor R_B and R_E are zero. A very accurate but simple formula for the threshold voltages is given, using an analysis similar to that of Roy.
  • Keywords
    Trigger circuits; Circuit stability; Circuits and systems; Digital filters; Hysteresis; Resistors; Testing; Threshold voltage; Trigger circuits;
  • fLanguage
    English
  • Journal_Title
    Circuits and Systems, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0098-4094
  • Type

    jour

  • DOI
    10.1109/TCS.1987.1086044
  • Filename
    1086044
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1195834