/usr/share/octave/packages/ocs-0.1.3/sbn/Mcurrentsources.m is in octave-ocs 0.1.3-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | ## Copyright (C) 2006,2007,2008 Carlo de Falco, Culpo Massimiliano
##
## 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>
## author culpo@math.uni-wuppertal.de
## -*- texinfo -*-
##
## @deftypefn{Function File} @
## {[@var{a},@var{b},@var{c}]=}Mcurrentsources(@var{string},@var{parameters},@
## @var{parameternames},@var{extvar},@var{intvar},@var{t})
##
## SBN file implementing models for current sources.
##
## @var{string} is used to select among models. Parameters are listed
## as inner items. Possible models are:
##
## @enumerate
## @item @var{string} = "DC" (Static indipendent current source)
## @itemize @minus
## @item I -> Current source value
## @end itemize
## @item @var{string} = "VCCS" (Voltage controlled current source)
## @itemize @minus
## @item K -> Control parameter
## @end itemize
## @item @var{string} = "sinwave" (Sinusoidal indipendent current
## source)
## @itemize @minus
## @item shift -> mean value of sinusoidal input
## @item Ampl -> amplitude of sinusoidal wave
## @item f -> frequency of sinusoidal wave
## @item delay -> delay of sinusoidal wave
## @end itemize
## @item @var{string} = "VCPS" (Voltage controlled power source)
## @itemize @minus
## @item K -> Control parameter
## @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] = Mcurrentsources (string,parameters,parameternames,extvar,intvar,t)
switch string
## LCR part
case "DC"
for ii=1:length(parameternames)
eval([parameternames{ii} "=" num2str(parameters(ii)) ";"])
endfor
a = zeros(2);
b = a;
c = [I -I]';
break
case "VCCS"
## Voltage controlled current source
K = 1;
for ii=1:length(parameternames)
eval([parameternames{ii} "=" num2str(parameters(ii)) ";"])
endfor
a = zeros(4);
b = [0 0 K -K;\
0 0 -K K;\
0 0 0 0;\
0 0 0 0];
c = zeros(4,1);
## NLC part
case "sinwave"
for ii=1:length(parameternames)
eval([parameternames{ii} "=" num2str(parameters(ii)) ";"])
endfor
I = shift+Ampl * sin(2*pi*(t+delay)*f );
a = zeros(2);
b = a;
c = [I -I]';
break
case "VCPS"
## Voltage controlled power source
K = 1;
for ii=1:length(parameternames)
eval([parameternames{ii} "=" num2str(parameters(ii)) ";"])
endfor
dv = extvar(3) - extvar(4);
I = K*(dv^2);
dIdv = 2*K*dv;
a = zeros(4);
b = [0 0 dIdv -dIdv;\
0 0 -dIdv dIdv;\
0 0 0 0;\
0 0 0 0];
c = [I -I 0 0];
otherwise
error (["unknown section:" string])
endswitch
endfunction
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