[SI-LIST] Re: Simulated time doamin using freq domain models

Dear Joel,

Assuming that you can unravel the meaning of the pole-zero parameters, you
can curl up with a good book on linear systems and actually synthesize the
circuit corresponding to these parameters.

The system most definitely should work in a .TRAN run.

One book that comes to mind immediately (and this probably dates me) is Aram
Budak's, Passive and Active Network Analysis and Synthesis, Boston, 
Houghton
Mifflin Company, 1964. I won't even mention the even older book.

Regards,

Paul
__________________

Joel Brown wrote:
> I am trying to run a simulation in LTSpice using what I think is a freq
> domain spice model supplied by a connector manufacturer.
> I tried this previously with a different model that had LAPLACE statements
> in it. I was told by Linear Tech this would probably not work in the time
> domain. 
>
> The model I have now has POLE-ZERO functions like this:
>
>  
>
> G_1_1 161 pg POLE 161 pg
>
> + -0.5113259737
>
> + -8.024176907e+010 0
>
> + 1064165150 -9906054846
>
> + 298211672 -6750230161
>
> + 3400708536 -6577097876
>
> + 727752505.4 -4935354629
>
> + -8556525.328 0
>
> + /
>
> + 1
>
> + 1416036658 -9898181440
>
> + 5.271741172e+010 0
>
> + 1.421215765e+010 -7131900170
>
> + 321756585.2 -6751551020
>
> + 748855739.3 -4995138526
>
> + 1.767690749e+010 0
>
>  
>
> It is really an Hspice model and according the Hspice manual this format is
> supported. The LTSpice manual does not show a POLE function being supported
> so I am not sure if it even knows what it is. I do have Hspice but cannot
> run it right now due to some licensing issues. But even if I could, will a
> POLE-ZERO function work in a transient time domain simulation? If not what
> good are these spice models?
>
>  
>
> Thanks - Joel
>
>  
>
>  
>
>
>
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