Mike,
You are making valid points, but here are a few more thoughts
to consider:
More points will slow the simulator down,
More points can increase the file size,
We generally want the (sum of the) I-V curves to be monotonic,
since non-monotonicity can introduce non-convergence, or false
convergence. Monotonic I-V curves generally need fewer points.
Thanks,
Arpad
====================================================
-----Original Message-----
From: Mike LaBonte [mailto:mlabonte@xxxxxxxxxx] ;
Sent: Tuesday, November 14, 2017 12:31 AM
To: Muranyi, Arpad <Arpad_Muranyi@xxxxxxxxxx>; si-list@xxxxxxxxxxxxx
Subject: RE: [SI-LIST] Re: IBIS generation: IV data for power and ground clamps
Yes you are correct Arpad. I'm also tempted to wonder if this application calls
for more I-V points. But equal voltage spacing is not required, and usually
there is some range through which large steps are acceptable. On the other
hand, it might be easier to automatically generate I-V curves if they could
always be fixed step with less worries about the number of points.
Mike
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Muranyi, Arpad
Sent: Tuesday, November 14, 2017 1:11 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: IBIS generation: IV data for power and ground clamps
Mike,
1000 points are only allowed for V-t tables. I-V tables
are limited to 100 points in all IBIS versions to date...
(see pg. 53 in the v6.1 IBIS spec):
[cid:image003.png@01D35CDD.174741B0]
Thanks,
Arpad
=========================================
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Mike LaBonte
Sent: Tuesday, November 14, 2017 12:01 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: IBIS generation: IV data for power and ground clamps
And beginning with IBIS 4.0, 1000 points are allowed.
Mike
On Nov 14, 2017, at 12:30 AM, Muranyi, Arpad<Arpad_Muranyi@xxxxxxxxxx<mailto:Arpad_Muranyi@xxxxxxxxxx>> wrote:
Pranesh,
The IBIS specification does not prohibit you to enter a wider range of
data in your I-V tables, you just need to keep the number of points to
no more then 100.
Thanks,
Arpad
=========================================================
-----Original Message-----
From:
si-list-bounce@xxxxxxxxxxxxx<mailto:si-list-bounce@xxxxxxxxxxxxx>
[mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Pranesh
Mahajanakatti
Sent: Monday, November 13, 2017 1:23 AM
To: si-list@xxxxxxxxxxxxx<mailto:si-list@xxxxxxxxxxxxx>
Subject: [SI-LIST] IBIS generation: IV data for power and ground
clamps
Hi,
The ESD clamps turn on for >75V at the pin.
Typical VDD is 15V, min is 5V and max is 50V. With sweep of -15 to30V(-VDD to 2VDD) for IV characteristics, the maximum sweep that will happen on
Hence, power clamp and ground clamp characteristics cannot be captured.
Question: Is it ok to exclude power and ground clamp characteristicsIBIS file in this case? Wouldn't end customer need clamp characteristics in the
in
Thanks for the help.
Thanks
Pranesh
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