[SI-LIST] Re: How to get RLC matrix from spice model
- From: "Grasso, Charles" <Charles.Grasso@xxxxxxxxxxxx>
- To: <ruehli@xxxxxxxxxx>, <Jason.R.Miller@xxxxxxx>
- Date: Mon, 5 Mar 2007 12:42:32 -0700
Tadashi=20
If you're using Q3D - there is an option to derive the RLC matrix. Or
are
you trying to reverse engineer a Spice deck generated by Q3D?
Call Ansoft. Maybe they can help.
Best Regards
Charles Grasso
Compliance Engineer
Echostar Communications Corp.
Tel: 303-706-5467
Fax: 303-799-6222
Cell: 303-204-2974
Pager/Short Message: 3032042974@xxxxxxxxx
Email: charles.grasso@xxxxxxxxxxxx
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Albert Ruehli
Sent: Thursday, March 01, 2007 4:10 PM
To: Jason.R.Miller@xxxxxxx
Cc: si-list@xxxxxxxxxxxxx; si-list-bounce@xxxxxxxxxxxxx;
tadashi.arai@xxxxxxx
Subject: [SI-LIST] Re: How to get RLC matrix from spice model
Jason
I don't exactly know how Q3D handles the model. It must be related to
the=20
circuit matrix in: Pinello, Cangellaris, Ruehli,"Hybrid electromagnetic
modeling of noise
interactions in packed electronics based on the partial element
equivalent=20
circuit=20
formulation", IEEE trans MTT, Vol. 45, No. 10, Oct. 1997. As you did
say,=20
current=20
dependent current sources are used for the capacitive couplings.
Al
Albert Ruehli=20
ruehli@xxxxxxxxxx
914-945-1592 TL 862-1592, Fax 914-945-4244=20
"Jason R. Miller" <Jason.R.Miller@xxxxxxx>=20
Sent by: si-list-bounce@xxxxxxxxxxxxx
03/01/2007 04:12 PM
Please respond to
Jason.R.Miller@xxxxxxx
To
tadashi.arai@xxxxxxx
cc
si-list@xxxxxxxxxxxxx
Subject
[SI-LIST] Re: How to get RLC matrix from spice model
Tadashi,
The F element is used in Q3D to handle coupling, similar to the K=20
element. The F element in Spice corresponds to a current-controlled=20
current source. The syntax is
Fname N1 N2 Vsource gain
where N1 and N2 are the positive and negative reference nodes for the=20
dependent source, Vsource is the name of the independent voltage source,
and the gain is the ratio of the current in the controlled source to=20
that of the controlling voltage source. The independent voltage source=20
is often chosen to be a zero-valued source. This is equivalent to an=20
ideal short circuit. The zero-valued voltage source can then serve as an
ideal ammeter in series with an inductor. The gain of the current=20
controlled current source elements are then adjusted to model the mutual
inductances based on the ratio of Lij/Lii. The sign of the gain can be=20
either positive or negative. This fact can be used to create negative=20
mutual inductances.
If you can't go back and get the RLC matrix directly from the vendor, I=20
thought this info might be a good starting point for obtaining the=20
matrix from the Spice model.
Thanks
Jason
Arai, Tadashi wrote:
> Gurus,
>=20
> Can someone tell me how to extract RLC matrix from connector spice
> model?
>=20
> I am trying to extract RLC matrix of a connector from a vendor spice
> model crated by Q3D. It was easy for me to get R matrix (only diagonal
> part) and C matrix, however, L matrix seemed a little complex.
> The spice model has L-elements which were diagonal part. And it seems
to
> be able to calculate the off-diagonal part of L matrix from
K-elements;
> Lij =3D Kij * SQRT(Lii * Ljj). But how to handle the F-elements? That =
is
> my question.
>=20
> Regards,
> ----=20
> Tadashi ARAI / MTS Application Engineer=20
> Hardware Support Engineering, Customer Support Services=20
> Japan Engineering Lab., AMD Japan Limited=20
> +81-3-3346-7687 / +81-3-3342-5196 (fax)=20
>
>=20
>
> ------------------------------------------------------------------
> 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:=20
>
//www.freelists.org/archives/si-list
> or at our remote archives:
> =20
http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>=20
>
>=20
------------------------------------------------------------------
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:=20
=20
//www.freelists.org/archives/si-list
or at our remote archives:
=20
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
=20
------------------------------------------------------------------
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: =20
//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
=20
------------------------------------------------------------------
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:
