Determine the output voltage ripple

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SUMMARY

The discussion focuses on determining the output voltage ripple from a digital oscilloscope measurement of 25.0007V. Participants emphasize the importance of measuring the peak-to-peak ripple voltage during the stabilization phase of the output. Key advice includes adjusting the oscilloscope settings to block DC while allowing AC signals to be measured accurately, which is crucial for obtaining a clear view of the ripple voltage without the DC offset interfering with the trace.

PREREQUISITES
  • Understanding of digital oscilloscopes and their settings
  • Knowledge of AC and DC signal characteristics
  • Familiarity with voltage ripple concepts in power electronics
  • Basic skills in interpreting oscilloscope waveforms
NEXT STEPS
  • Learn how to configure oscilloscope settings for AC coupling
  • Research methods for measuring peak-to-peak voltage accurately
  • Study the effects of load conditions on voltage ripple
  • Explore techniques for stabilizing output voltage in power supplies
USEFUL FOR

Electrical engineers, students in electronics courses, and anyone involved in power supply design or analysis will benefit from this discussion.

ToonBlue
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Homework Statement


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Homework Equations

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?
 
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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?
 
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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