[SI-LIST] Re: Differential Z-One port
- From: timoceous <timoceous@xxxxxxxxx>
- To: Craig Clewell <tthumb0000@xxxxxxxxxxx>, si <si-list@xxxxxxxxxxxxx>
- Date: Fri, 2 Sep 2005 15:57:53 -0700 (PDT)
Hi Craig,
My E-mail got sent out too quick so I wasn't able
to finish what I was saying. The element has three
ports:
-----
---> 1 -| | --> 2
-----
|
3
With port 3 as global ground. I have used the
.NET and using Z11(i) and etc. to try to calculate
the Leq but got the wrong values. I have also tried
to do what you have suggested which I used an AC
source
at port 1 and use a VCVS to mirror the same source
with
180 phase shift at port 2 and got the same wrong
result.
I am curious if the .LIN with "port" sources in
the "Hspice" can do the trick. From the .LIN and get
the S11,S12,S22,S21 etc and use it to transform it
to Z one port Leq. Does any one know how to do that?
I am new to the "port" sources and every time I try
it, it failed to simulate.
Thanks,
Tim
--- Craig Clewell <tthumb0000@xxxxxxxxxxx> wrote:
> you can use the same source you have on now, but add
> a second and put a 180
> phase shift on it, or you can use the same source
> and reverse the
> positive/negative nodes so that the positive node is
> going to ground instead
> of the negative.
> ----- Original Message -----
> From: "timoceous" <timoceous@xxxxxxxxx>
> To: "si" <si-list@xxxxxxxxxxxxx>
> Sent: Friday, September 02, 2005 5:50 PM
> Subject: [SI-LIST] Differential Z-One port
>
>
> > Hi all,
> >
> > I have one element which I am tring to use
> Hspice
> > to find out the Leq. I am told to use the
> imaginary
> > differential Z one port to measure the Leq. The
> issue
> > is that I know how to do it single-ended but I
> don't
> > know how to do in differential.
> >
> > I have used .LIN for the single-ended measurements
> but
> > for the differential what kind of source would I
> use?
> >
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