CD Convergence improvements
Hi all,
I have browsed the Opera database (the database of the IEEE papers). There
is an interesting papers appeared in:
IEEE Transactions on circuits an systems I
Foundamental theory and applications
VOL 46 NO 6 JUNE 99
A Fixed-Point Homotopy Method for solving Modified Nodal Equations
This papers, written by Yamamura, Sekiguchi and Inoue presents an
application of homotopy methos to circuit simulation. They states that
using homotopy methods they are able to simulate efficiently circuits with
more than 10.000 elements.
They say in the abstract:
[OMISSIS]
"There are several approaches to applying the homotopy methods to
large-scale circuit simulation. One of them is combining the publicy
available software package of the homotopy metods (usch as HOMPACK) with
the general-pourpose circuit simulators such as SPICE. Hoever, the
homotopy method uding the fixed point (FP) homotopy (that is provided in
the default HOMPACK) is not guaranteed to converge for the modified nodal
(MN) equations that are usedn in SPICE. In this paper, we propose a
modified algorithm of the homotopy method using the FP homotopy and prove
that this algorithm is globally convergent for the MN equations."
[OMISSIS]
This seem an interesting starting point for spice improvements. I think I
will try to implement this on the ng-spice. Someone would like to help me
?
The HOMEPACK is available from acm
Paolo
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