[SI-LIST] Re: S-parameter for differential signals in Hspice
- From: "Mirmak, Michael" <michael.mirmak@xxxxxxxxx>
- To: <whizplayer@xxxxxxxxx>, "si_list" <si-list@xxxxxxxxxxxxx>
- Date: Thu, 13 Feb 2003 16:35:10 -0800
Bob,
A computationally-intensive, but effective, approach is to calculate the
differential (mixed-mode) S-parameters such as SDD12, SDD11, etc. using the
appropriate single-ended S-parameters and a spreadsheet or mathematics software
suite. For example, if you were interested in SDD12 (differential insertion
loss assuming a differential stimulus), you could use your existing SPICE deck
to obtain the complex values of S12, S14, S32 and S34 separately and then apply
the appropriate conversion equation:
SDD12 = 0.5*(S12-S14-S32-S34)
The standard equations are available through a variety of sources.
I hope this helps!
- Michael Mirmak, Intel Corp.
-----Original Message-----
From: Bob Patel [mailto:whizplayer@xxxxxxxxx]
Sent: Thursday, February 13, 2003 4:28 PM
To: si_list
Subject: [SI-LIST] S-parameter for differential signals in Hspice
Hi! I know how to get S-parameters for single ended
traces in Hspice but how do I get S-parameter for
differential signals in Hspice.
I am looking for the correct syntax. Do I use inverted
source for the other trace?
Thanks
Bob
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