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Zener Diode

Discussion in 'General Electronics Discussion' started by Pavan Penugonda, Nov 30, 2015.

  1. Pavan Penugonda

    Pavan Penugonda

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    Nov 30, 2015
    • If two Zener diodes are connected in series and if there is an ac input voltage ,how varies the output voltage ?[​IMG]
     
  2. hevans1944

    hevans1944 Hop - AC8NS

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    Jun 21, 2012
    You will get a clipped sine wave. Is this a homework problem? Did you already ask this question as member "stones" in All About Electronics forum here? It is considered impolite to cross-post to two or more forums. The question was answered most adequately in your All About Electronics post.
     
    Last edited: Nov 30, 2015
    Ian, davenn, Arouse1973 and 1 other person like this.
  3. Martaine2005

    Martaine2005

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    May 12, 2015
    If it's homework, it's about 6 weeks late:).
    He either copied and pasted someone else's work, or they write exactly the same!!

    Martin
     
  4. SHAIK MAHABOOB BASHA

    SHAIK MAHABOOB BASHA

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    Dec 1, 2015
    what are the uses of PIV in rectifiers
     
  5. duke37

    duke37

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    Jan 9, 2011
    PIV is the peak inverse voltage. This is the voltage that the diode can withstand. It is wise to have a diode which can withstand higher voltages than normally obtained in order to cater for transients which may occur.
     
  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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  7. Minder

    Minder

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    Apr 24, 2015
    This is the reverse voltage limit, obviously when forward biased there is only a small voltage across the diode as it is conducting at this point.
    M.
     
  8. hevans1944

    hevans1944 Hop - AC8NS

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    Jun 21, 2012
    @SHAIK MAHABOOB BASHA : Welcome to Electronics Point!

    This thread is (or was!) about zener diodes. It is considered impolite to jump into a thread with a new topic as you just did. This is called hi-jacking a thread. People do that all the time in forums, and I am guilty of it myself, but we should avoid it. In the future, please initiate a new topic title before posting.

    However, since we are already here... zener diodes do not have a PIV (peak inverse voltage) because they are operated in a reverse-biased mode that intentionally causes reverse breakdown at the zener voltage. Current limiting is required after the zener voltage is exceeded. In a normal diode, used as a rectifier, reverse breakdown (PIV exceeded) will generally result in failure of the diode because there is no current-limiting impedance in the circuit.
     
    Martaine2005 likes this.
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