[SI-LIST] Re: Pole/Zero Extraction from measured S-parameter
- From: "Teo Yatman" <tyatman@xxxxxxxxxxx>
- To: <Raymond.Anderson@xxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Wed, 22 May 2002 18:53:35 -0700
Hi Ray,
Since you mentioned one commercial tool, I'd like to add that a new tool was
just released by Sigrity, Inc. called Broadband SPICE, which generates
accurate SPICE circuits over broadband frequencies for components or
networks of complex frequency domain responses. For more information please
visit:
http://www.sigrity.com/corp/news/archive/pr08.htm
Teo
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Ray Anderson
Sent: Thursday, February 21, 2002 9:46 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Pole/Zero Extraction from measured S-parameter
Jong-Sang-
I don't have the time at the moment to delve into all technicalities
and details of what you are trying to accomplish, however I just
wanted to mention that there is at least one commercial tool
available that is designed to accomplish the task you propose.
It is 'SPAR' written by Applied Simulation Technology (Apsim).
I believe Hspice has the ability to extract poles/zeroes
from a transfer function as well, but it doesn't generate
the rational function spice model for you.
Given a list of s-parameters SPAR extracts the poles and zeros and
genrates a spice compatible 'black-box' model which in the form
of a ratio of polynomials.
Beware though, that one must be careful that the generated approximation
(Pade' or whatever) exhibits both stability and passivity.
-Ray Anderson
Sun Microsystems Inc.
>
>Dear SI-List members.
>
>I am looking for any method or code for transfer function pole/zero
extraction
from measured S-parameter.
>The measured S-parameter is from coaxial cable.
>
>I summarized what I have tried and its results for better advice.
>1. Decide the candidate rational function(6th-order numerator and 6th-order
denomenator) for the cable transfer function.
>2. Execute nlinfit function at MATLAB.
>3. Result : The approximated rational function fits roughly but it doesn't
seem
to fit accurately enough.
>4. Result : The approximated rational function coefficient includes
imaginary
part(i.e. complex coefficient) -> (Is this proper result? Can the Pole/Zero
be
extracted from such a complex coefficient?).
>
>Thanks in advance for your help.
>
>------------------------------------------------------
>Jong-Sang Choi
>Ph.D Candidate, Seoul National University, Seoul, Korea.
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
