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zeners

Discussion in 'General Electronics Chat' started by t.man, Aug 21, 2009.

  1. t.man

    t.man New Member

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    what's the main purpose of connecting two zeners facing each other?
     

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  2. Hero999

    Hero999 Banned

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    It's for over voltage transient suppression.

    The breakdown voltage is equal to the Vf plus the reverse breakdown voltage.

    You can buy transient suppressors which are just two zeners connected back-to-back. The advantage is that it can be used for AC.
     
  3. Warpspeed

    Warpspeed Member

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    The usual application for this is for use in ac circuits to clamp an ac voltage equally on both positive and negative halves of each cycle.
     
  4. dave

    Dave New Member

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  5. Styx

    Styx Active Member

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    bipolarity clamp ±(Vz + Vd)
    It is also used across the capacitor in OPAMP integrator circuit to clamp the output to a know level and stop the OPAMP driving itself into saturation (and thus cause issue and delays if/when it is winding out of saturation)
     
  6. electronspeed

    electronspeed New Member

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    This back-back connection can also be used to clip the sinusoidal signal depending upon i/p and Vz of diode.This can be extended further to generate square wave.
     

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