FreeLists / si-list / [SI-LIST] Re: Undershoot, Overshoot

["Jon Powell" <jpowell@xxxxxxxxxxxx>]

There are actual IEEE standard definitions of Overshoot and Undershoot.
They are essentially what people are saying here.


> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx
> [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Todd Westerhoff
> Sent: Thursday, December 06, 2001 10:00 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: Undershoot, Overshoot
> 
> 
> 
> Ahem.  Correction.
> 
> SPECCTRAQuest "Overshoot High" is referenced to ground, not 
> the rail as I
> stated earlier.  The user has to subtract the rail voltage, 
> which will vary
> between the {fast, typical, slow} cases to get the actual 
> overshoot beyond
> the rail.
> 
> Arpad's note reminded me of this ...
> 
> Happy Holidays,
> 
> Todd.
> 
> Todd Westerhoff
> SI Engineer - Hammerhead Networks
> 5 Federal Street - Billerica, MA - 01821
> email:twester@xxxxxxxxxxx - ph: 978-671-5084
> ============================================
> 
> "Oh, but ain't that America, for you and me
>  Ain't that America, we're something to see
>  Ain't that America, Home of the Free
>  Little pink houses, for you and me"
> 
> - John Mellencamp
> 
> 
> 
> 
> 
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx
> [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Todd Westerhoff
> Sent: Thursday, December 06, 2001 12:24 PM
> To: Andrew.Ingraham@xxxxxxxxxx; si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Undershoot, Overshoot
> 
> 
> 
> If I had my way, I would relate electrical overshoot and 
> undershoot to their
> mechanical equivalents as such:
> 
> Overshoot = underdamped
> Undershoot = overdamped
> 
> Therefore, I would call the amount a signal bounces below 
> ground on the
> incident edge "negative overshoot".
> 
> Andy is quite right, however - there is abundant disagreement 
> about this
> particular terminology, so this is just my opinion.
> 
> As for SPECCTRAQuest, it calls the amount the signal exceeds the rail
> "Overshoot High", and the amount the signal goes below ground 
> "Overshoot
> Low".
> 
> Happy Holidays,
> 
> Todd.
> 
> Todd Westerhoff
> SI Engineer - Hammerhead Networks
> 5 Federal Street - Billerica, MA - 01821
> email:twester@xxxxxxxxxxx - ph: 978-671-5084
> ============================================
> 
> "Oh, but ain't that America, for you and me
>  Ain't that America, we're something to see
>  Ain't that America, Home of the Free
>  Little pink houses, for you and me"
> 
> - John Mellencamp
> 
> 
> 
> 
> 
> 
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