[SI-LIST] Re: Extract/Convert Lumped Spice model to T-line model

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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