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diff --git a/octave_packages/ocs-0.1.3/sbn/Minductors.m b/octave_packages/ocs-0.1.3/sbn/Minductors.m
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+## Copyright (C) 2006,2007,2008  Carlo de Falco            
+##
+## This file is part of:
+## OCS - A Circuit Simulator for Octave
+##
+## OCS is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program (see the file LICENSE); if not,
+## see <http://www.gnu.org/licenses/>.
+##
+## author: Carlo de Falco <cdf _AT_ users.sourceforge.net> 
+
+## -*- texinfo -*-
+##
+## @deftypefn{Function File} @
+## {[@var{a},@var{b},@var{c}]=}Minductors(@var{string},@var{parameters},@
+## @var{parameternames},@var{extvar},@var{intvar},@var{t})
+##
+## SBN file implementing models for inductors.
+##
+## @var{string} is used to select among models. Parameters are listed
+## as inner items. Possible models are:
+##
+## @enumerate
+## @item @var{string} = "LIN" (Linear inductor model)
+## @itemize @minus
+## @item L -> inductance value
+## @end itemize
+## @end enumerate
+##
+## See the @cite{IFF file format specifications} for details about 
+## the output structures.
+##
+## @seealso{prs_iff,asm_initialize_system,asm_build_system}
+## @end deftypefn
+
+function [a,b,c] = Minductors (string,parameters,parameternames,extvar,intvar,t)
+
+  if isempty(intvar)
+    intvar = [0 0];
+  endif
+
+  switch string 
+      
+    case "LIN"
+      for ii=1:length(parameternames)
+	eval([parameternames{ii} "=" num2str(parameters(ii)) ";"])	
+      endfor
+      
+      phi = intvar(1);
+      jl  = intvar(2);
+
+      a = [0 0 0 0; 
+	   0 0 0 0; 
+	   0 0 1 0; 
+	   0 0 0 0];
+
+      b = [0 0 0 1; 
+	   0 0 0 -1; 
+	   -1 1 0 0; 
+	   0 0 1 -L];
+
+      c = [0 0 0 0]';
+    otherwise
+      error (["unknown section:" string])
+  endswitch
+
+endfunction
+  
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