From: Mckinley, Jory (Jory.Mckinley@compaq.com)
Date: Thu Dec 02 1999 - 13:56:14 PST
Yes a simple LC network is not appropriate for most if not all MLM
connectors but it will give a very very crude first approximation. A more
complete picture would be to have the artwork for the MLM connector in a
board format like Allegro (PADS,Mentor,..). From this board file one can
create with a layup the necessary coupled TL model for XTK simulations. The
TL model can be included into XTK as a multi-board.
The non-ideal return currents and power/ground noise can be modeled with AC
grade but this is not included in the general XTK software.
I hope this helps,
From: Scott McMorrow [mailto:email@example.com]
Sent: Thursday, December 02, 1999 4:06 PM
Subject: Re: [SI-LIST] : XTK multiboard simulation using amp spice
connector models....... ..
Does this also work with coupled MLM connector models. It seems
to me that in this case a lumped LC is not enough.
I also do not believe that XTK will handle the non-ideal return paths
correctly, will it? Nor the noise induced into ground and power pins.
Syed Huq wrote:
> This multi-board sim is quite easy to setup in XTK. You can use TOPSPEC to
> define any connector via a lumped LC.(See example in Ch6 of 'Preparing PCB
> database for simulation with TLC/XTK/QUIET' or Ch7 of XTK users manual)
> Then use a hdf and con file to define the hierarchy of boards connecting
> to each other and the 'mapping' of the connections(con file). This con
> describes how the nets get tied across the connector.(See examples in Ch7
> 'Preparing PCB database for simulation with TLC/XTK/QUIET').
> Then follow the translation process and it's a piece of cake.
> % tmp -hdf <design>.hdf
> % isf2xtk -hdf <design>.hdf
> Cisco Systems, Inc
> > Hello SI List,
> > I am continuing my investigation of XTK and have run into
> > a bit of a road block that I thought you might be able to help me with.
> > I have a desire to perform a multi-board system simulation where my
> > board to board interconnect is a standard 2 mm HM connector that
> > is used and supported by lots of folks. I have an AMP MLM for the
> > connector and would prefer not to fill my day modifying spice decks.
> > My feedback from folks to date has been that 'ya can't get there from
> > here', unless of course I would like to re-write the model myself for
> > use within XTK.
> > I know that alot of folks in telecom are using this connector
> > and are probably using XTK. What are my options? Any good?
> > Thanks for the help.
> > Best Regards,
> > Michael Greim
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