[SI-LIST] Re: About S2ibis2
- From: "james cui" <cui_930@xxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Tue, 28 Nov 2006 19:38:35 +0800
Hi, Lynne
I have already tried the second way to add Vcc_core voltage source
within the subckt, but "no covergence" in dc sweep curves at 3.300v
I want to try the first way .But how can I use s2ibis3 model to
extract data from hspice?
How can I choose the s2ibis3 model?
>From: "Lynne D. Green" <lgreen22@xxxxxxxxxxxxxx>
>Reply-To: lgreen22@xxxxxxxxxxxxxx
>To: <cui_930@xxxxxxx>, <si-list@xxxxxxxxxxxxx>
>Subject: [SI-LIST] Re: About S2ibis2
>Date: Mon, 27 Nov 2006 20:50:14 -0800
>
>Hi, James,
>
>First, you must decide how Vcc_core will vary with corners. It might vary
>in the same direction as Vcc_pu, or in the opposite direction, or not at
>all. SPICE can help you determine the best/worst case combinations
>(corresponding to IBIS min/max corners).
>
>The SPICE input files must have Vcc (Vcc_pu) set the normal way for
>s2ibnis3. The Vcc_core (1.8V) source must be created, with the desired
>voltage, before the SPICE files generated by s2ibis3 are simulated. This
>can not be done using the default s2ibis3 flow.
>
>There are two ways to add a Vcc_core voltage source under s2ibis3. One
>could add the Vcc_core pin to the subckt AND to every call to the subckt,
>and add a Vcc_core voltage source - this requires editing EVERY SPICE file
>generated by s2ibis3, running SPICE, then running s2ibis3 model extraction.
>Alternatively, one could add a Vcc_core voltage source within the subckt -
>this has the advantage that one does not need to edit the s2ibis3 netlists,
>except to set the voltage for Vcc_core. I personally prefer the second
>approach, but either one will work.
>
>Best of luck,
>Lynne
>
>PS: Please check my web site for upcoming IBIS training classes. We are
>willing to arrange classes in additional locations.
>
>
>"IBIS training when you need it, where you need it."
>
>Dr. Lynne Green
>Green Streak Programs
>http://www.greenstreakprograms.com
>425-788-0412
>lgreen22@xxxxxxxxxxxxxx
>
>-----Original Message-----
>From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
>Behalf Of james cui
>Sent: Monday, November 27, 2006 7:47 PM
>To: si-list@xxxxxxxxxxxxx
>Subject: [SI-LIST] About S2ibis2
>
>Hello,ALL
>thanks Lynne for your help
>I have another question about S2IBIS2.
>
>
>How can I change ".DC" sweep range to generate Pullup curve,but not change
>core power?
>(now) **Pullup curve Vcc=1.8v
> **core power Vcc=1.8v
>(I want)**Pullup curve Vcc=3.3v
> **core power Vcc=1.8v
>
>Thanks
>
>
>------------------------------------------------------------------
>To unsubscribe from si-list:
>si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
>or to administer your membership from a web page, go to:
>//www.freelists.org/webpage/si-list
>
>For help:
>si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>List FAQ wiki page is located at:
> http://si-list.org/wiki/wiki.pl?Si-List_FAQ
>
>List technical documents are available at:
> http://www.si-list.org
>
>List archives are viewable at:
> //www.freelists.org/archives/si-list
>or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
>Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today it's FREE!
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl?Si-List_FAQ
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
