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Determine the output voltage ripple

  1. Sep 8, 2015 #1
    1. The problem statement, all variables and given/known data
    upload_2015-9-8_22-53-22.png

    2. Relevant equations


    3. The attempt at a solution
    This is my load voltage output from my digital scope.
    From the digital scope , my output voltage is 25.0007V but how do I find the ripple voltage from the given data?
     
    Last edited by a moderator: Sep 8, 2015
  2. jcsd
  3. Sep 8, 2015 #2

    berkeman

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    Staff: Mentor

    Yikes! That's a heck of an overshoot on startup that you have there, Scooter! :woot:

    The ripple is the peak-to-peak ripple voltage that you see as the voltage is stabilizing. Can you zoom in on that ripple near the end of the startup?
     
  4. Sep 9, 2015 #3

    CWatters

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    Science Advisor
    Homework Helper

    ToonBlue.. Are you asking how to set up the scope to measure the ripple accurately?

    The problem is that you can't just turn up the gain because the 25V DC offset will send the trace off the screen, probably further than the zero adjust will cope with.

    We aren't allowed to just give you the answer but have a think how you might change the scope settings to block DC but allow AC.
     
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