full wave rectifier with PWL diode

Discussion in 'Homework Help' started by jut, Sep 15, 2009.

  1. jut

    Thread Starter Senior Member

    Aug 25, 2007
    224
    2
    Each diode is modeled as a piece-wise linear device with the following parameters:
    Vd = 0.7
    Rd = 26Ω

    This means an ideal diode in series with a 0.7 voltage source in series with 26 ohm resistor, right?

    Task:
    a) Sketch Vs and Vo as a function of time.
    b) Calculate the ripple voltage of O v and determine what percentage it is of the peak output voltage.

    [​IMG]
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    For the first replace the diodes with their equivalent circuit and use a simulation software to sketch it for you.

    For the second you will need a bit of math. :p

    To an approximation:

    Vodc=Vpeak/[1+1/(4fCR)]

    Vripple=Vdc/(2fCR)

    f=mains frequency
     
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