Qucs-core  0.0.19
cccs.cpp
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00001 /*
00002  * cccs.cpp - cccs class implementation
00003  *
00004  * Copyright (C) 2003, 2004, 2006, 2008 Stefan Jahn <stefan@lkcc.org>
00005  *
00006  * This is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License as published by
00008  * the Free Software Foundation; either version 2, or (at your option)
00009  * any later version.
00010  *
00011  * This software is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this package; see the file COPYING.  If not, write to
00018  * the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
00019  * Boston, MA 02110-1301, USA.
00020  *
00021  * $Id$
00022  *
00023  */
00024 
00025 #if HAVE_CONFIG_H
00026 # include <config.h>
00027 #endif
00028 
00029 #include "component.h"
00030 #include "cccs.h"
00031 
00032 using namespace qucs;
00033 
00034 cccs::cccs () : circuit (4) {
00035   type = CIR_CCCS;
00036   setVoltageSources (1);
00037 }
00038 
00039 void cccs::calcSP (nr_double_t frequency) {
00040 
00041   nr_double_t g = getPropertyDouble ("G");
00042   nr_double_t t = getPropertyDouble ("T");
00043 
00044   nr_complex_t z1 = qucs::polar (g, pi - 2.0 * pi * frequency * t);
00045   nr_complex_t z2 = qucs::polar (g, - 2.0 * pi * frequency * t);
00046 
00047   setS (NODE_1, NODE_1, 0.0); setS (NODE_1, NODE_2, 0.0);
00048   setS (NODE_1, NODE_3, 0.0); setS (NODE_1, NODE_4, 1.0);
00049   setS (NODE_2, NODE_1, z1);  setS (NODE_2, NODE_2, 1.0);
00050   setS (NODE_2, NODE_3, 0.0); setS (NODE_2, NODE_4, z2);
00051   setS (NODE_3, NODE_1, z2);  setS (NODE_3, NODE_2, 0.0);
00052   setS (NODE_3, NODE_3, 1.0); setS (NODE_3, NODE_4, z1);
00053   setS (NODE_4, NODE_1, 1.0); setS (NODE_4, NODE_2, 0.0);
00054   setS (NODE_4, NODE_3, 0.0); setS (NODE_4, NODE_4, 0.0);
00055 }
00056 
00057 void cccs::initDC (void) {
00058   setISource (false);
00059   allocMatrixMNA ();
00060   nr_double_t g = getPropertyDouble ("G");
00061   setC (VSRC_1, NODE_1, +1.0); setC (VSRC_1, NODE_2, +0.0);
00062   setC (VSRC_1, NODE_3, +0.0); setC (VSRC_1, NODE_4, -1.0);
00063   setB (NODE_1, VSRC_1, +1/g); setB (NODE_2, VSRC_1, +1.0);
00064   setB (NODE_3, VSRC_1, -1.0); setB (NODE_4, VSRC_1, -1/g);
00065   setD (VSRC_1, VSRC_1, 0.0);
00066   setE (VSRC_1, 0.0);
00067 }
00068 
00069 void cccs::initAC (void) {
00070   initDC ();
00071 }
00072 
00073 void cccs::calcAC (nr_double_t frequency) {
00074   nr_double_t g = getPropertyDouble ("G");
00075   nr_double_t t = getPropertyDouble ("T");
00076   nr_complex_t r = qucs::polar (1.0 / g, - 2.0 * pi * frequency * t);
00077   setB (NODE_1, VSRC_1, +r); setB (NODE_4, VSRC_1, -r);
00078 }
00079 
00080 void cccs::initTR (void) {
00081   nr_double_t t = getPropertyDouble ("T");
00082   initDC ();
00083   deleteHistory ();
00084   if (t > 0.0) {
00085     setISource (true);
00086     setHistory (true);
00087     initHistory (t);
00088     setB (NODE_1, VSRC_1, +1.0); setB (NODE_2, VSRC_1, +0.0);
00089     setB (NODE_3, VSRC_1, -0.0); setB (NODE_4, VSRC_1, -1.0);
00090   }
00091 }
00092 
00093 void cccs::calcTR (nr_double_t t) {
00094   nr_double_t T = getPropertyDouble ("T");
00095   if (T > 0.0) {
00096     T = t - T;
00097     nr_double_t g = getPropertyDouble ("G");
00098     nr_double_t i = getJ (VSRC_1, T);
00099     setI (NODE_2, -g * i);
00100     setI (NODE_3, +g * i);
00101   }
00102 }
00103 
00104 // properties
00105 PROP_REQ [] = {
00106   { "G", PROP_REAL, { 1, PROP_NO_STR }, PROP_NO_RANGE }, PROP_NO_PROP };
00107 PROP_OPT [] = {
00108   { "T", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE }, PROP_NO_PROP };
00109 struct define_t cccs::cirdef =
00110   { "CCCS", 4, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };