[SI-LIST] Re: Converting SPICE rlgc files into ADS
- From: Ozgur Misman <omism@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Thu, 24 Feb 2005 14:59:49 -0700
Well,
I think the coupled t-line elements in the ADS multilayer interconnect
libaray account for the metal loss.
Substrate loss can also be defined in the stackup and also is part of
multilayer library,
Obviously this is not whats being asked here but as a general pointer i
know that lossy coupled transmission line models
are part of ADS library and simulations that properly accounts for
dielectric and metal losses
is something that can be accomplished within ADS.
Ozgur
"Grossman, Brett" <brett.grossman@xxxxxxxxx>@freelists.org on 02/24/2005
02:39:24 PM
Please respond to brett.grossman@xxxxxxxxx
Sent by: si-list-bounce@xxxxxxxxxxxxx
To: <hmiranda@xxxxxxxx>, <si-list@xxxxxxxxxxxxx>
cc:
Subject: [SI-LIST] Re: Converting SPICE rlgc files into ADS
Henrique,
I apologize if this sends you in the wrong direction as I am pulling it
from a rusty memory.
But...
Within ADS, the transmission line elements in the multi-layer library
have an option to save the model in RLGC format. I believe that this
same element can then be used to point back to the RLGC file, and then
use this file instead of the internal field solver to define the model.
I also believe that the format of the RLGC matrix elements is defined
differently between ADS and Hspice, and that ADS describes their format
(and perhaps the difference) in their help files.
So, you could convert your RLGC matrix into an ADS RLGC matrix file, and
then use the mutli-layer tline element to point to this new file.
Sorry again if any of this is incorrect. I have a recollection of doing
it once, and writing an excel macro to generate the ADS file from the
Hspice file. But unfortunately lack the recall ability to find it
immediately.
Best regards,
-Brett
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Henrique Miranda
Sent: Monday, February 21, 2005 2:44 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Converting SPICE rlgc files into ADS
Hello all,
I have a rlgc file (used in a SPICE w-element) that models a coupled
line
system and I would like to use this model in the ADS simulator.
This file is as follows:
* N (number of lines)
2
* Lo (inductance matrix)
255e-9
20e-9 255e-9
* Co (Capacitance matrix)
95e-12
-11e-12 95e-12
* Ro (Resistance matrix)
3.98
0 3.98=09
* Go (conductance matrix)
1.2e-12
0 1.2e-12
* Rs (skin effect matrix)
0.003
0 0.003
* Gd (dielectric loss matrix)
7.5e-12
0 7.5e-12
Is there a way to convert the rlgc file data into some ADS library
component?
>From library search the most promising component to achieve this is the
CLINP (Libra Lossy Coupled Transmission Lines) which asks for even and
odd
mode impedances, even and odd mode effective dielectric constants and
even and
odd mode attenuation (dB/m). I seems that there are no frequency
dependent
elements in this component (which I need to include)
Are there other alternatives that I am missing?
Thank you very much for any help.
Henrique
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