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Limiting\Clamping Circuits

Discussion in 'General Electronics Discussion' started by Gary Dent, Feb 25, 2012.

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  1. Gary Dent

    Gary Dent

    Feb 13, 2012
    Zener diodes are often used in clamping circuits as shown,

    I understand that once the waveform reaches a certain threshold given by the zener diode the zener diode stops conducting, my question is why doesnt the voltage fall to 0 from here? That is on the image I linked to there is a flat line at xV where x is not 0, this implies a DC voltage of some sort.
  2. jackorocko


    Apr 4, 2010
    A zener diode will conduct two ways. Like a normal diode when it is forward biased by about 0.7V and reversed biased (depends on the reverse breakdown voltage). The only time a zener will not conduct is when either the forward or reverse voltage threshold has not been met.
    Last edited: Feb 25, 2012
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