[SI-LIST] Re: RLC value extraction for power plane
- From: "Yuriy Shlepnev" <shlepnev@xxxxxxxxxxxxx>
- To: "'Benny Luiss'" <bennyluiss@xxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Fri, 5 Aug 2011 08:55:44 -0700
Benny,
Here is another way to construct an equivalent circuit for PDNs.
Similar to a transmission line segment approximation with RLGC equivalent
circuit, a small rectangular parallel plane or transmission plane area can
be approximated with so called "bedspring model" constructed with R, L, G
and C elements. It follows from simple 5-point finite difference
approximation of 2D Telegrapher's equations describing behavior of
transmission planes (or from equivalent 2D Helmholtz equation). Equivalent
circuits of the rectangular elements can be then united to simulate planes
with arbitrary geometry. Note, that wave-guiding problems with field
structure similar to parallel planes have been analyzed with the equivalent
RLC circuit models in
J.R. Whinnery, S. Ramo, A new approach to the solution of high-frequency
field problems, Proc. IRE, May, 1944, p. 284-288.
A simplest cell may have four identical R and L, and G and C. To account for
dielectric dispersion and skin effect, additional R, L, G and C can be added
using multi-pole Debye approximation. Connecting such net with circuit
models of transitions and de-coupling structures allows analysis of PDNs in
SPICE-type simulators (some simulators are optimized for the analysis of
such nets). See more on construction of circuit models for PDNS and
references in
http://www.shlepnev.com/Publications/ACES2006c.pdf.
Yuriy Shlepnev
www.simberian.com
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Benny Luiss
Sent: Thursday, August 04, 2011 10:15 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] RLC value extraction for power plane
Hi,
I am Benny an SI novice.Can any one help how to extract RLC values for power
plane. I have tried in Cadence and Hyperlynx but couldn't able to extract
(even by removing voltage values assigned for the power nets).
Do any other software like Ansoft or HFSS provide this?
Thanks,
Benny
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