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Why a Little Ringing in Step Load Isn’t Such a Little Problem
8/14/2013

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Figure 4: Step load response of a LM317 voltage regulator also shows the two ringing frequencies resulting from each of the two load currents in the step.  This figure also shows the impact of setting the step rate equal to the resonant frequency.
Figure 4: Step load response of a LM317 voltage regulator also shows the two ringing frequencies resulting from each of the two load currents in the step. This figure also shows the impact of setting the step rate equal to the resonant frequency.

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Steve.Picotest
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Re: Um...
Steve.Picotest   8/15/2013 4:16:21 PM
NO RATINGS
The simple version is that while a little ringing looks like one frequency it is really in fact many frequencies.  These all contribute to circuit noise and so a little ringing equals a lot of noise.

 

Thanks for reading and for taking the time to comment

 

Steve.Picotest
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Does this topic "resonate" with you (sorry, but couldn't resist)
Steve.Picotest   8/14/2013 5:25:14 PM
NO RATINGS
Please let me know if you have seen stability problems that degraded circuit performance or feel free ask any questions you might have about how to solve such problems.  I do like opportunities to talk with all of you

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