Yuancheng=

<= /p>

It is easy to extract good VT data from a me= asurement if you have the proper equipment. We’ve done this for= 1000s of models.

&nb= sp;

Hopefully you are not tryin= g to measure at -3.3V. If you are I can understand that there would b= e a large difference between what is measured and what the manufacture̵= 7;s model shows. I’ve not seen an IC’s ground clamp that could = handle that much forward bias. You need to keep the forward bias to a= volt or less in most cases and extrapolate to –Vdd. But withou= t knowing what difference you are seeing it is hard to tell why you are see= ing it.

<= /span>

Regards,

Tom Dagostino

Teraspeed = Labs

13610 SW Harness Lane=

Beaverton, OR 97008<= /o:p>

503-430-1065<= /p>

tom@teraspeed.com

www.teraspeed.com

Te= raspeed Consulting Group LLC

121 North River Drive
Narragansett, RI 02882

401-284-1827

www.teraspeed.com

From: ow= ner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of ji xiao
Sent: Tuesday, November 23, 2010 1:15 AM
To: = ibis-users
Subject: [IBIS-Users] Extract IBIS data from lab measu= rement

Dear= all,

I want to extract the IV and Vt data from the ch= ip measurement results, but there are two problems.

1. For the Vt data, IBIS cookbook Version 4.0 and 5.0 only mention the = procedure of extract ramp rate. If I want to extract the detail Vt curve ta= ble from the measurement results of a packaged chip, is it possible? =

2. For the IV data, I successfully extract it f= rom the measurement but the extracted result only show agreement with origi= nal IBIS model (provided by manufacturer) for operation region. When = out of the operation region, i.e., in diode model, the IV characteristics &= nbsp;I got is quite different from the original one.

<= /div>
For example, the voltage operation region of my chip is [-0.5, 3.= 8], in this range, the measurement value of current is reasonable. However,= for the current measured beyond this voltage range, such as [-3.3, -0.5], = the measurement result will distort severely from the original IBIS value. = Could anyone help me analyze the possible reason for the disagreement? Or i= s there something wrong I may make in measurement setting? (I made the meas= urement setup according to cookbook version4.0)
=

Thank= s and regards,
&n= bsp;
Yuancheng
<= p class=3DMsoNormal>
--
This message has been scanned for viruses an= d
dangerous content by Mail= Scanner, and is
believed to be clean.

--=20
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean. - ------=_NextPart_000_041A_01CB8AAF.89371730-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Fri, 10 Dec 2010 15:48:48 -0800 From: Bob Ross Subject: [IBIS-Users] New IBISCHK5 Version 5.0.4 Executables All: Per the announcement at the IBIS meeting today, a partial set of ibischk5 executables (Version 5.0.4) are uploaded for several operating systems: http://www.eda.org/ibis/ibischk5/ and the previous versions 5.0.3 are under the old_v503/ subdirectory. See 00readme.txt for more information, but the following BUG reports were processed: BUG99 Misleading Text in [Node Declarations] Error Message BUG101 No Warning for Unused [Model Selector] Name BUG103 Driver Schedule Delay Value Tests BUG105 Incorrect Error for [Model Selector] Description Field Length BUG106 S_overshoot_* Invalid for Some Model_types BUG107 Checking for [Ramp] dV_r and dV_f BUG114 V4.X Name and Column Lengths for [Submodel] and [Model Selector] BUG118 Vmeas Check with Version 4.2.1 and Beyond Failure BUG119 Waveform Test Missing Results with Version 4.2.1 and Beyond BUG121 Broken Missing [Component] Test Note, BUG107 now allows checking (and calculation) of dV_f and dV_r when the -caution flag is used. Several executables still need to be generated and uploaded. Let us know if there are any errors or problems. Bob - -- Bob Ross Teraspeed Consulting Group LLC Teraspeed Labs 121 North River Drive 13610 SW Harness Lane Narragansett, RI 02882 Beaverton, OR 97008 401-284-1827 503-430-1065 http://www.teraspeed.com 503-246-8048 Direct bob@teraspeed.com Teraspeed is a registered service mark of Teraspeed Consulting Group LLC - -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Thu, 16 Dec 2010 15:40:45 -0500 From: "Lance Wang" Subject: [IBIS-Users] IBIS SUMMIT at DesignCon 2011 - First call for participation and presentations This is a multipart message in MIME format. - ------=_NextPart_000_00B3_01CB9D37.9BD65C30 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To All: The IBIS Open Forum is pleased to announce our IBIS Summit meeting at DesignCon 2011. The Summit will be held at the Santa Clara Convention Center in Santa Clara, California, during DesignCon 2011. IBIS Summits are designed to enable face-to-face interactions between model users, model makers and tool developers in the IBIS Community. Those interested in presenting at or in attending the event may register using the information below. The IBIS Open Forum is sponsoring the event, but we welcome additional sponsors to cover some of the meeting expenses, including the FREE lunch and refreshments. We look forward to seeing you in Santa Clara! Best Regards, Michael Mirmak Intel Corp. Chair, IBIS Open Forum - ----------------------------------------------------------------------- IBIS SUMMIT FIRST CALL FOR PARTICIPATION & PRESENTATIONS - ----------------------------------------------------------------------- I B I S S U M M I T M E E T I N G Time/Date: Thursday, February 3, 2011 8:00 AM to 5:00 PM Location: Santa Clara Convention Center 5101 Great America Parkway, Santa Clara, California, USA Room: Great America Ballroom 3 Santa Clara Convention Center Content: Presentations and Discussions Purpose: Solicit and Exchange IBIS Model Related Information and ideas. Costs: FREE Sponsors: IBIS Open Forum, DesignCon We are seeking more co-sponsors. The benefits to sponsors include recognition at the meeting and acknowledgement in the Calls for Papers and meeting minutes. Your financial support strengthens the organization by allowing IBIS to focus resources on industry activities rather than raising money. You will receive generous thanks and public acknowledgement for your support. Please contact Lance Wang for co-sponsorship information. DesignCon 2011 Conference: January 31 - February 4, 2011 Santa Clara Convention Center Santa Clara, CA http://www.designcon.com/2011/ Exhibits registration: http://designcon.techinsightsevents.com/how_to_register Conference Schedule: http://designcon.techinsightsevents.com/conference Information on discounts for IBIS Summit attendees will be announced when available. BACKGROUND DesignCon is the premier annual Silicon Valley event for the electronic design automation (EDA) and semiconductor industry. Topics of current interest to the IBIS Open Forum are addressed at DesignCon. This meeting will be conducted as a formal IBIS meeting. Presentations are expected to be available and archived in an electronic format, and minutes of the meeting will be issued. Any pending formal decisions (votes) will be announced at least two weeks prior to the meeting. CALL FOR PARTICIPANTS People involved in IBIS Model development, EDA tool development, and digital circuit design are invited to participate in the Summit meeting. If you plan to participate, please register with the information below: Name: E-mail address: Company: Telephone: Send your registration information to Lance Wang . Registration deadline is Wednesday, January 27, 2011 to receive the free lunch. CALL FOR PRESENTATIONS We are seeking presentations from individuals who have experiences of interest to the IBIS modeling community. These can include, but are not limited to: Demonstrations of modeling techniques Explanations of behavioral algorithms Descriptions of difficulties encountered Model correlation Modeling building experiences Comparisons to other modeling methods New technologies for modeling buffers and component New technologies for modeling packaging and interconnects Algorithmic modeling topics Etc. Presentations may be addressed to any and all levels of IBIS experience, from beginner to expert. Presentation Format: Microsoft Powerpoint* or Adobe Acrobat* electronic formats are favored and will pre-loaded on the Microsoft Windows*-based meeting laptop prior to the meeting. Materials will be projected but handouts or other physical media are welcome. Time: Usually 15-30 Minutes Electronic Archival: Presentations will be archived under the IBIS Summits site and also must be submitted in time for uploading and copying. Final submission deadline is: Wednesday, January 27, 2011 Otherwise, presenters must bring 50 copies for distribution. If you plan a presentation, please supply the following information as soon as possible: Presentation Title: Presenter: E-mail address: Company: Telephone: Estimated Time: Send to - Michael Mirmak Note, vendor-specific or product promotion material is forbidden at IBIS summits. We strongly advise that the presentations be submitted by the deadline for review. The IBIS Open Forum reserves the right to stop or reject a scheduled presentation that has not been reviewed. AGENDA The agenda includes presentations, discussions, breaks, and a FREE lunch. A formal list of speakers and topics will be released one week prior to the event. HOTEL AND TRAVEL INFORMATION The Hotel and Travel Link below provides a conference hotel discount, as well as transportation suggestions: http://designcon.techinsightsevents.com/travel_information - -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. - ------=_NextPart_000_00B3_01CB9D37.9BD65C30 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
To All:

=
The IBIS Open Forum is pleased to anno= unce our IBIS Summit meeting at
DesignC= on 2011. The Summit will be held at the Santa Clara Convention <= /o:p>
Center in Santa Clara, California, during Des= ignCon 2011.

IBIS Summits are designed to enable face-to-face interactio= ns between
model users, model makers an= d tool developers in the IBIS Community.
Those interested in presenting at or in attending the event may register
using the information below. <= /o:p>

The= IBIS Open Forum is sponsoring the event, but we welcome additional
sponsors to cover some of the meeting expenses= , including the FREE lunch and
refreshm= ents.

We look forward to seeing you in Santa Clara!

<= /p>
Best Regards,
<= o:p>

Michael Mirmak
Intel Corp.<= /o:p>
Chair, IBIS Open Forum

-----------= - ------------------------------------------------------------

=
       &n= bsp;            = ;           IBIS SUMMIT <= o:p>
      &nbs= p;            &= nbsp;          FIRST CALL= FOR
          &= nbsp;    PARTICIPATION & PRESENTATIONS <= /p>

&nbs= p;
------------------------------------------= - -----------------------------
&nbs= p;

=             &nb= sp;     I B I S   S U M M I T   M E= E T I N G

Time/Date: Thursday= , February 3, 2011 8:00 AM to 5:00 PM
<= o:p>

Location: Santa Clara Convention Center
          5101 G= reat America Parkway,
   = ;       Santa Clara, California, USA

=
Room:     Gre= at America Ballroom 3
   =        Santa Clara Convention Center

=
Content: Presentations and Discu= ssions

Purpose: Solicit = and Exchange IBIS Model Related Information and
           = ideas.

Costs:  = ; FREE

Sponsors: IBIS Open Forum, DesignCon

         = ;   We are seeking more co-sponsors. The benefits to sponsors inc= lude
     &nbs= p;      recognition at the meeting and acknow= ledgement in the Calls
  &nbs= p;         for Papers and meet= ing minutes.

   = ;        Your financial support st= rengthens the organization by
&nb= sp;          allowing IBI= S to focus resources on industry activities
           &nbs= p;rather than raising money. You will receive generous
         = ;   thanks and public acknowledgement for your support.

&= nbsp;           Please co= ntact Lance Wang <lwang@iometh.com> for co-sponsorship
         = ;   information.
&nb= sp;

DesignCon 2011 Conference:
= ;

&= nbsp;           January 3= 1 - February 4, 2011
   =          Santa Clara Conventio= n Center
     =        Santa Clara, CA

&n= bsp;            = ;http://www.designcon.com/2011/
&n= bsp;

            Exhibi= ts registration:

<= p class=3DMsoNormal>
  &= nbsp;           http://de= signcon.techinsightsevents.com/how_to_register

          = ; Conference Schedule:
&nbs= p;
    &= nbsp;         http://designcon= .techinsightsevents.com/conference
=

Information on discounts for IBIS Summit attendees will be announced
when available.

BACKGROUND
&nbs= p;

= DesignCon is the premier annual Silicon Valley event for the electronic
design automation (EDA) and semiconductor = industry. Topics of current
interest to= the IBIS Open Forum are addressed at DesignCon.

This meeting will be conducted as a formal IBIS meeting.=

Presentations are expected to= be available and archived in an electronic
format, and minutes of the meeting will be issued. Any pending formal =
decisions (votes) will be announced at = least two weeks prior to the
meeting. <= o:p>

CALL FOR PARTICIPANTS

People involved in IBIS Model development, EDA tool development, and <= o:p>
digital circuit design are invited to pa= rticipate in the Summit meeting.
If you= plan to participate, please register with the information below:

&= nbsp;
   Name:
   E-mail address:
   Company:
   Telephone:
&nbs= p;

= Send your registration information to Lance Wang <lwang@iometh.com>. =

Registration deadline is Wedne= sday, January 27, 2011 to receive the free
lunch.

CALL FOR PRESENTATIONS

We are seeking prese= ntations from individuals who have experiences of
interest to the IBIS modeling community. These can include, bu= t are not
limited to:

   Demonstrations of modeling techniq= ues
   Explanations of b= ehavioral algorithms
   = Descriptions of difficulties encountered
   Model correlation
&= nbsp;  Modeling building experiences
   Comparisons to other modeling methods =
   New technologies for modeling bu= ffers and component
   N= ew technologies for modeling packaging and interconnects
   Algorithmic modeling topics =
   Etc.

Presentations may be addressed to any and all levels of I= BIS experience,
from beginner to expert= .

Presentation Format:

&nbs= p; Microsoft Powerpoint* or Adobe Acrobat*
   electronic formats are favored and will pre-loa= ded on the
   Microsoft = Windows*-based meeting laptop prior to the meeting.
   Materials will be projected but handouts or = other physical media
   are we= lcome.

Time: Usually 15-30 Minutes
<= o:p>

Electronic Archival:
= ;
   Presentations will be archived= under the IBIS Summits site
&nbs= p; and also must be submitted in time for uploading and copying. =
   Final submission deadline = is:

     W= ednesday, January 27, 2011

&nbs= p; Otherwise, presenters must bring 50 copies for distribution. =

If you plan a presentation, please = supply the following information as
soo= n as possible:

   Pr= esentation Title:
   Pre= senter:
   E-mail addres= s:
   Company:
   Telephone:
   Estimated Time:

Send to - Mich= ael Mirmak <michael.mirmak@intel.com>

Note, vendor-specific or product promotion material is forbid= den at
IBIS summits. We strongly = advise that the presentations be submitted
by the deadline for review. The IBIS Open Forum reserves the right to <= o:p>
stop or reject a scheduled presentation = that has not been reviewed.
=

AG= ENDA

The agenda includes prese= ntations, discussions, breaks, and a FREE
lunch. A formal list of speakers and topics will be released one
week prior to the event.

HOTEL AND TRAVEL INFORMATION

The Hotel and Travel Link below provides a confe= rence hotel discount, as
well as transpo= rtation suggestions:
<= /p>

&nb= sp; http://designcon.techinsightsevents.com/travel_information

--=20
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean. - ------=_NextPart_000_00B3_01CB9D37.9BD65C30-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ End of ibis-users V1 #164 *************************