[SI-LIST] Re: Using W-element in Spectre
- From: Srivats Partha <vats123@xxxxxxxxx>
- To: lindazhang_si@xxxxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Tue, 18 Jul 2006 22:47:11 -0700 (PDT)
Hello Linda
I had a similar problem, Instead there are two things I think you could do
1) There is a tool called LMG in cadence that generates the RLCG matrix for a
given geometry. So take the geometry from your WLINE model plug it into this
tool and it will give you the corresponding RLGC values. Than you should
highlight "use external model file" in the MTLINE dialog box. Once that is done
you have to plug that file generated by this tool that has the RLGC matrix into
your MTLINE model.It looks like the MTLINE can only understand that and not
the wline model directly.
2) You can look at the in the Spectre RF documentation under the heading
"Modeling transmission lines" they give you a step by step procedure on how to
use this tool do the simulations.Once thats done you can compare the frequency
response of you wline model and this model generated by LMG to confirm . Also
be sure to plug in the loss tangent values correctly. You could also use a 2D
solver to compare the results.
I found this tool very good and the results obtained were comparable to the
wline model.hope this helps
srivats
---
Linda Zhang <lindazhang_si@xxxxxxxxxxx> wrote: Hi all,
Does anyone know how to use W-element model (generated from Apsim RLGC) in
Cadnece Spectre. I tried using 'mtline', but I am not sure what format the
'RLGC data file' should be. I can put in the numbers of 'R/L/G/C matrix per
unit length' manually. It runs but the result is strange. I don't know if I
can trust it.
Did anyone use it before? Thank you in advance.
Linda
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P.Srivatsan
Graduate Student
ECE Dept,North Carolina State University
http://www4.ncsu.edu/~spartha2/
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