FreeLists / si-list / [SI-LIST] Re: Query on Fast slow and typical simulation

[<vani.chandrasekharan@xxxxxxxxx>]

=0D
Thanks for taking the time to explain and clarify. You have further
kindled my interest in this subject.
That was great help.

Warm regards
Vani


-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Jim Antonellis
Sent: Thursday, August 04, 2005 10:05 AM
To: Vani Chandrasekharan (WT01 - Software Products & OSS);
si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Query on Fast slow and typical simulation


Vani,

These represent 3 process corners whereby the devices (CMOS FETs) are
strong (resulting in fast propagation and edge rates), weak (resulting
in slow propagation and edge rates), or nominal (which results in
typical propagation and edge rates).

In simulation, to cover Process-Voltage-Temperature (PVT) variation you
may run your simulations with the following permutations:

1- Fast (process), High (voltage), Low (temp)
2- Typ (process), nominal (voltage), nominal (temp)
3- Slow (process), Low (voltage), high (temp)

Case #1 would be a Best Case (BC) PVT corner, good for testing fast
edge-rate si effects and hold timing (in a synch system).

Case #3 would be a Worst Case (WC) PVT corner, good for testing slow
edge-rate si effects and setup timing issues (in a synch sys).

***Please note, these are the traditional effects on CMOS FETS ***and a
recent posting to this list discussed how deep sub micron ***will
actually have opposite effects. Also, bipolar designs are ***again
different. Having said all that, I do believe this is still ***a valid
explanation, you now need to adapt it to your technology ***and
requirements.

Regards,
Jim


-
Jim Antonellis   janton@xxxxxxxxxxxxx
Sandburst Corp   www.sandburst.com
Office: 978.689.1669
Cell: 978.618.4745

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-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of
vani.chandrasekharan@xxxxxxxxx
Sent: Thursday, August 04, 2005 12:21 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Query on Fast slow and typical simulation



Hi all,

I was wondering what fast, slow and typical mode of simulation imply. In
my case all these files are encrypted so could not have much idea about
these modes.

Considering a Tr-ch-Rx setup, could you help me understand what exactly
is contained in a spice file describing fast slow and typical modes.

Thanks and warm regards
Vani



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