[SI-LIST] Re: S-parameter for differential signals in Hspice
- From: "Clewell, Craig" <cclewell@xxxxxxxxxxxxxx>
- To: "'whizplayer@xxxxxxxxx'" <whizplayer@xxxxxxxxx>,si_list <si-list@xxxxxxxxxxxxx>
- Date: Fri, 14 Feb 2003 08:19:26 -0500
Bob,
Here is a short netlist that will work for differential S param. If you
copy and paste this into a separate file you can re-use this over and over
again. To get S11 you read the voltage between nodes 4 and 8 and connect
your inputs to nodes 2 and 6. To get S21 you connect your outputs to nodes
9 and 12, and read the voltage between nodes 11 and 14. This is a simple
circuit to draw out and connect the dots to (I really used to like to do
that at the dentist office), but if you would like me to send you a
schematic for clarification let me know.
V10 1 0 DC=0 AC=.5 PULSE 0 100 100e-142
R60 1 2 50
E3 3 0 2 0 2
V27 4 3 AC=-.5
R62 4 0 1e9
V28 5 0 DC=0 AC=-.5 PULSE 0 -100 0 100e-12
R65 5 6 50
E4 7 0 0 6 2
V29 8 7 AC=-.5
R66 8 0 1e9
R3 9 10 50
V11 10 0 DC=6 AC=0
E5 11 0 9 0 2
R63 11 0 1e9
R67 12 13 50
V30 13 0 DC=6 AC=0
E6 14 0 12 0 2
R68 14 0 1e9
.END
Craig Clewell
-----Original Message-----
From: Bob Patel [mailto:whizplayer@xxxxxxxxx]
Sent: Thursday, February 13, 2003 7:28 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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