Qucs-core  0.0.19
vcvs.cpp
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00001 /*
00002  * vcvs.cpp - vcvs 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 "vcvs.h"
00031 
00032 using namespace qucs;
00033 
00034 vcvs::vcvs () : circuit (4) {
00035   type = CIR_VCVS;
00036   setVoltageSources (1);
00037 }
00038 
00039 void vcvs::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, 1.0); setS (NODE_1, NODE_2, 0.0);
00048   setS (NODE_1, NODE_3, 0.0); setS (NODE_1, NODE_4, 0.0);
00049   setS (NODE_2, NODE_1, z2);  setS (NODE_2, NODE_2, 0.0);
00050   setS (NODE_2, NODE_3, 1.0); setS (NODE_2, NODE_4, z1);
00051   setS (NODE_3, NODE_1, z1);  setS (NODE_3, NODE_2, 1.0);
00052   setS (NODE_3, NODE_3, 0.0); setS (NODE_3, NODE_4, z2);
00053   setS (NODE_4, NODE_1, 0.0); setS (NODE_4, NODE_2, 0.0);
00054   setS (NODE_4, NODE_3, 0.0); setS (NODE_4, NODE_4, 1.0);
00055 }
00056 
00057 void vcvs::initDC (void) {
00058   nr_double_t g = getPropertyDouble ("G");
00059   allocMatrixMNA ();
00060   setC (VSRC_1, NODE_1, +g); setC (VSRC_1, NODE_2, -1.0);
00061   setC (VSRC_1, NODE_3, +1.0); setC (VSRC_1, NODE_4, -g);
00062   setB (NODE_1, VSRC_1, +0); setB (NODE_2, VSRC_1, -1.0);
00063   setB (NODE_3, VSRC_1, +1.0); setB (NODE_4, VSRC_1, +0);
00064   setD (VSRC_1, VSRC_1, 0.0);
00065   setE (VSRC_1, 0.0);
00066 }
00067 
00068 void vcvs::initAC (void) {
00069   initDC ();
00070 }
00071 
00072 void vcvs::calcAC (nr_double_t frequency) {
00073   nr_double_t T = getPropertyDouble ("T");
00074   nr_complex_t g = qucs::polar (getPropertyDouble ("G"),
00075                           - 2.0 * pi * frequency * T);
00076   setC (VSRC_1, NODE_1, +g); setC (VSRC_1, NODE_4, -g);
00077 }
00078 
00079 void vcvs::initTR (void) {
00080   nr_double_t T = getPropertyDouble ("T");
00081   initDC ();
00082   deleteHistory ();
00083   if (T > 0.0) {
00084     setHistory (true);
00085     initHistory (T);
00086     setC (VSRC_1, NODE_1, 0.0); setC (VSRC_1, NODE_4, 0.0);
00087   }
00088 }
00089 
00090 void vcvs::calcTR (nr_double_t t) {
00091   nr_double_t T = getPropertyDouble ("T");
00092   if (T > 0.0) {
00093     T = t - T;
00094     nr_double_t g = getPropertyDouble ("G");
00095     nr_double_t v = getV (NODE_4, T) - getV (NODE_1, T);
00096     setE (VSRC_1, g * v);
00097   }
00098 }
00099 
00100 // properties
00101 PROP_REQ [] = {
00102   { "G", PROP_REAL, { 1, PROP_NO_STR }, PROP_NO_RANGE }, PROP_NO_PROP };
00103 PROP_OPT [] = {
00104   { "T", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE }, PROP_NO_PROP };
00105 struct define_t vcvs::cirdef =
00106   { "VCVS", 4, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };