FreeLists / si-list / [SI-LIST] Re: Specctraquest Multiboard

["Lucas Bossetti" <Lucas_Bossetti@xxxxxxxxxxx>]

Carlos,
You say that if I want to perform Xtalk simulation I have to define both single 
and coupled models.
So the situation is the following:
Reflection ........analysis    SQ uses SingleLineCircuits
Xtalk................ analysis     SQ uses CoupledLineCircuits

Is this true?
Why SQ needs SingleLineCircuits if all the informations are supplied by 
CoupledLineCircuits (CoupledLineCircuits is more detailed than 
SingleLineCircuits)

Thanks again
Lucas




----- Original Message ----- 
From: "Carlos Moll" <cmoll@xxxxxxxxxxx>
To: <Lucas_Bossetti@xxxxxxxxxxx>; <si-list@xxxxxxxxxxxxx>
Sent: Wednesday, July 10, 2002 3:24 PM
Subject: RE: [SI-LIST] Specctraquest Multiboard


Lucas,

For Package models.....

Single Line Circuits is a required subparameter for Circuit Models keyword
this option must describe a single subcircuit model for each pin (ex. supports 
Reflection). 
Coupled Line Circuits is an optional subparameter for Circuit Models keyword
this option will describe the coupling and support the coupling window as 
defined in the preferences section (ex. supports Crosstalk, Comprehensive).

You can use either Single Line or Both (Single Line + Coupled line) but Not 
Coupled Line Circuits subparameter standalone.
Note when using keyword Coupled Line Circuits, any RLGC keyword definition 
specified as part of package model is ignored.

You may find some examples in your cadence install directory/share/pcb/signal 
directory (cds_packages.dml)

There is also other options (block circuits, etc.), if you want to get more 
details, I would suggest to start a thread in specctraquest.com.

Hope this helps.

Carlos Moll
Cadence Design Systems, Inc.



-----Original Message-----
From: Lucas Bossetti [mailto:Lucas_Bossetti@xxxxxxxxxxx]
Sent: Saturday, July 13, 2002 7:40 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Specctraquest Multiboard


Hi,
I'm setting up a multiboard simulation in Specctraquest.
The 2 boards (same .brd) are connected with 2 connectors and a cable.
The connectors models are IbisDevice with a spice subcircuit in 
a Package model and a DesignLink connect the 2 boards.
If I assign a "SingleLineCircuits" spice model the simulation works well. 
(reflection)
Problems occour when I try to assign  a "CoupledLineCircuits" to the  Package 
model. (needed for comprehnsive and crosstalk simulation)
If I assign only Coupledlinecircuits the 2 boards seems like disconnect.
Have I to assign both SingleLineCircuits and CuopledLineCircuits?
If so, how they're used? (singleline for reflection and coupled for 
comprehnsive and crosstalk simulation?)
SQ reference manual asserts that Sub-parameter SingleLineCircuits is REQUIRED 
in defining CircuitModels; Why? Isn't "SingleLine" model embedded in multi-line 
model?
 
Any suggestion or comment about this topic will be appreciate.

Thanks and regards 
Lucas 





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