[SI-LIST] Re: Causality
- From: Cosmin Iorga <ci249534@xxxxxxxxx>
- To: Jennifer Maharani <jennifer.maharani@xxxxxxxxx>, "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Thu, 14 May 2009 16:01:23 -0700 (PDT)
Jenifer,
In addition to all the good advice you have received so far from experts in the
field, I would like to suggest that if none of the tools mentioned are able to
solve you causality issue you may ultimately "manually" build an RLC Spice
model from the s-parameters frequency sweep simulations. This model will not
be so accurate like the broadband spice models, but at least it will give you
something to work with. I have attached an example of RLC model built from
s-param simulation (file: s_param_rlc_model.tif), where you can see also the
error between the RLC model and the s-param simulation. The "C" values are
calculated from the "DOWN" slopes, "L" values from "UP" slopes or resonant
peaks, and "R" form minimums of the resonant peaks, as shown in the figure.
Contact me if you need more details.
Cosmin Iorga, Ph.D.
NoiseCoupling.com
http://www.noisecoupling.com
________________________________
From: Jennifer Maharani <jennifer.maharani@xxxxxxxxx>
To: "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
Sent: Thursday, May 14, 2009 12:48:44 PM
Subject: [SI-LIST] Causality
Dear all,
I have non-passive non-causal S-parameter. I can use some commercial
tools that can generate broadband spice with passivity enforcement.
Not with causality enforcement, though.
In transient simulation it clearly shows non-causal response.
Does anybody know how to resolve this issue? Quick and dirty solution
will also be appreciated.
Many thanks.
------------------------------------------------------------------
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 technical documents are available at:
http://www.si-list.net
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 technical documents are available at:
http://www.si-list.net
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: