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H and y parameters for CB and CE transistors

  1. Nov 21, 2013 #1
    1. The problem statement, all variables and given/known data

    When I measure CB ciruit:
    cx53fiyhqs1xxlokcfe.png
    I have got these results:
    xxer7tg35jruq8wnrxn.png

    And here CE:
    7i6xjfvb09dzkgncvt6i.png
    1od1gc5pnuzqx0w8x0.png


    2. Relevant equations



    3. The attempt at a solution
    So.. here is table, how to calculate h parameters:
    onac6pa5p06f8jfg8zv.png

    But I don't understand, am I using it correctly. When I use results of my table where results are 0, then always h parameters is 0 or infinity.
    Both circuit is without resistance.. so Hie should be 0?
    How to calculate there parameters correctly?
     
  2. jcsd
  3. Nov 21, 2013 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    Zero measured current just means your amperemeter was not precise enough. Ignore those (and maybe very small current values as well).
    Zero voltage values: Similar issue, ignore them.
     
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