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What does "ringing" look like on PSUD simulation?

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Posted on February 11, 2017 at 11:15:53
DAK
Audiophile

Posts: 1737
Location: PACIFIC
Joined: August 8, 2010
Contributor
  Since:
December 0, 0000
And other bad sounding graphs. In fact is there a reference to what one should look for in a psud simulation and what to avoid. cheers. Dak

 

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RE: What does "ringing" look like on PSUD simulation?, posted on February 11, 2017 at 19:34:46
Posts: 767
Joined: June 16, 2006
If you google PSUD 2 you will find all kinds of tutorials on how to use the program. I don't currently have PSUD loaded on this computer (new computer)
so I can't produce a ringing example for you. however, basically if you use
the current step function the line should drop down and then go flat or maybe jump up a bit. but if the line drops then jumps back up then down many times until it flattens out, that is ringing.

cal

 

RE: What does "ringing" look like on PSUD simulation?, posted on February 11, 2017 at 20:48:29
Triode_Kingdom
Audiophile

Posts: 5768
Location: Texas
Joined: September 24, 2006
PSUD can't be used to assess ringing other than at an extremely rudimentary level. For one thing, ringing of the PSU can be caused by excitation from either the source or load, and there is no provision for that in PSUD. For another, the amplitude of the PSU response to excitation will vary as a function of frequency. PSUD does not allow inputs other than the three line-frequency choices, and there is no provision for a dynamic load other than the simplistic step function. If you want to analyze the response of the PSU in this regard, a more versatile simulator is required.



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Buy Chinese. Bury freedom.

 

RE: What does "ringing" look like on PSUD simulation?, posted on February 11, 2017 at 21:48:26
DAK
Audiophile

Posts: 1737
Location: PACIFIC
Joined: August 8, 2010
Contributor
  Since:
December 0, 0000
OK, for a step load what are the considerations for inputting the step load? For example my total load is about 220ma. What do you input for a step load under those conditions?

 

RE: What does "ringing" look like on PSUD simulation?, posted on February 12, 2017 at 10:11:27
hennfarm
Audiophile

Posts: 529
Location: Oregon
Joined: October 8, 2008
Go 200ma. Stepped to 240ma. Then Look at voltage at c1, c2,c3 etc... Overshoot prior to settling is essentially a form of ringing. A generality would be the more series dcr in a supply the leas likely to ring(in audio band)/ JH

 

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