[SI-LIST] Re: Temperature variable in SI simulation
- From: "Chetan Jadhav" <chetan@xxxxxxxxxxxxxxxxxxxxxxx>
- To: "SI-list" <si-list@xxxxxxxxxxxxx>
- Date: Thu, 27 Mar 2003 20:53:56 +0530
Hi Luca,
Thanks.
I could do it with my tool.
Extending the question:
If anybody is aware that in future IBIS standards these three levels could
be extended to more??
Regards,
Chetan
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Luca Giacotto
Sent: Thursday, March 27, 2003 1:49 PM
To: chetan@xxxxxxxxxxxxxxxxxxxxxxx; SI-list
Subject: [SI-LIST] Re: Temperature variable in SI simulation
Hi Chetan,
IBIS models accounts for high/low temperatures in the "min" and "max"
data values. In the same way, they account for the variations of the
supply voltage and the fabrication process.
That is, the I-V and V-T tables have:
1) a "typical" column, whose data are extracted from a buffer in typical
PVT (process/voltage/temperature) conditions;
2) a "max" column, whose data are extracted from a buffer in the fast
PVT (process/voltage/temperature) conditions (e.g., max temperature,
fast process and high supply level, or whichever mix of these conditions
is fastest);
3) a "min" column, whose data are extracted from a buffer in the slow
PVT (process/voltage/temperature) conditions (e.g., max temperature,
fast process and high supply level, or whichever mix of these conditions
is slower).
Thus, you just need to set your preferred EDA tool in order to simulate
with the set of data you want.
Hope it helps,
Luca
On Thu, 27 Mar 2003 11:29:09 +0530
"Chetan Jadhav" <chetan@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Hi experts,
>
> I want to do SI simulation of my design at various temperatures.
>
> The IBIS models of the devices specify temperature ranges as 0 to 100
degree
> C and a typical value of 50 degree C.
> My knowledge is, the VI and VT curves of the devices are specified at 50
> degree C.
>
> How can I specify board and device temperatures in Cadence Spectra Quest??
>
> Even if there is a way, will the SI tool really scale the VI curves with
> specified temperature??
>
> Regards,
> Chetan
>
>
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--
Luca Giacotto <lgiacott@xxxxxxxxx>
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