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Homework Help: Half wave rectifier circuit

  1. Nov 4, 2012 #1
    1. The problem statement, all variables and given/known data

    Using the approximate triangular output shown and Vdc previously calculated, use the expression Vout=Vdc + Vac to solve for Vac. Find an expression for Vac that is valid from t=0 to t=T. Your expression should be in terms of Vp,R,C,T and t.

    The circuit is a half wave rectifier with a capacitor.

    Eventually I am trying to calculate ripple factor but I need the Vac to calculate Vrms and then onto calculating ripple = Vac rms / Vdc

    2. Relevant equations

    Vdc= Vp - VpT/2RC where Vp= voltage at peak

    Vout=Vdc + Vac

    3. The attempt at a solution

    I am not sure what I am supposed to be using for V out. I was given Vin=Vocosωt where T=2∏/ω is the period of the input signal.

    Am I supposed to use Vpcosωt for my Vout?
  2. jcsd
  3. Nov 4, 2012 #2
    I figured it out, I had to assume that I was looking at a straight line between t=0 and t=T. Then formulate a y=mx+b for the line. That was my Vout I was looking for.
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