[SI-LIST] Re: Extract/Convert Lumped Spice model to T-line model
- From: "Pillie, Max" <max_pillie@xxxxxxxxxxx>
- To: "'hassan@xxxxxxxx'" <hassan@xxxxxxxx>, si-list@xxxxxxxxxxxxx
- Date: Wed, 25 Feb 2004 09:53:30 -0800
YK Gian,
You can model the connector as coupled transmission lines in LineSim using the
"Coupled Stackup" method.
If you have HSPICE installed on the same computer and you have the LineSim GHZ
option, you can assign the HSPICE connector model to nodes in your LineSim
schematic, launch the HSPICE simulation from LineSim's oscilloscope dialog, and
observe the results of the HSPICE simulation on the oscilloscope waveform
viewer.
The quickest way to get up to speed on these methods is to refer to the
HyperLynx demo/tutorial program. Contact me directly and I can help.
Max Pillie
Mentor Technical Support
Support_hyperlynx@xxxxxxxxxx
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Hassan O. Ali
Sent: Wednesday, February 25, 2004 9:13 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Extract/Convert Lumped Spice model to T-line
model
The correct equivalent model will have to have a pair of coupled transmission
lines.
Does LineSim support coupled transmission lines?
To generate the coupled-line equivalent model, you can use the optimization
feature of
HSPICE, using, for example, frequency-dependent S-parameters as your goal. That
is, you
continue to vary the variables of your new model and you stop when the
S-parameters of
the new model match the S-parameters of the original model in the frequency
range of
interest.
Hassan.
On Feb 25, Gian YK-r58635 <yeekoy.gian@xxxxxxxxxxxx> wrote:
>
> All,
>
> I am new to HSPICE and also simulation. I need some advise on how to convert
> the
lumped SPICE model below to a T-line model (so that I can model it as a
connector in
LineSim). It is a compatible model for test probe.
>
> Cs:Total shunt capacitance
> C21:Mutual-capacitance between adjacent pins
> Ls:Pin self-inductance
> Lm:Mutual inductance between adjacent pins
> Rs:Shunt-resistance of inductors Rs used to model high frequency loss due to
> skin
effect and dielectric loss
>
>
> GND GND
> | |
> Cs/2 |---Rs---| Cs/2
> | | | |
> o-------------Ls-------------o
> | |
> IN C21 C21 OUT
> (DUT) | | (BOARD)
> | |
> o-------------Ls-------------o
> | | | |
> Cs/2 |---Rs---| Cs/2
> | |
> GND GND
>
>
>
> Thanks & best regards,
> YK
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