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Zener diode slope resistance

  1. Sep 21, 2009 #1
    what is the mean of "slope resistance" of zener diode? Its parallel to diod or series?
  2. jcsd
  3. Sep 21, 2009 #2


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    Staff: Mentor

    Look at the plot of the Current versus Voltage for the diode in forward and revers bias. In reverse bias, where the Zener diode starts to conduct, there is a slope to the curve. That slope can be thought of as a "resistance", if you linearize (average) it over some range of reverse bias.
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