Qucs-core  0.0.19
vpulse.cpp
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00001 /*
00002  * vpulse.cpp - pulse voltage source class implementation
00003  *
00004  * Copyright (C) 2004, 2005, 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 "vpulse.h"
00031 
00032 using namespace qucs;
00033 
00034 vpulse::vpulse () : circuit (2) {
00035   type = CIR_VPULSE;
00036   setVSource (true);
00037   setVoltageSources (1);
00038 }
00039 
00040 void vpulse::initSP (void) {
00041   allocMatrixS ();
00042   setS (NODE_1, NODE_1, 0.0);
00043   setS (NODE_1, NODE_2, 1.0);
00044   setS (NODE_2, NODE_1, 1.0);
00045   setS (NODE_2, NODE_2, 0.0);
00046 }
00047 
00048 void vpulse::initDC (void) {
00049   allocMatrixMNA ();
00050   voltageSource (VSRC_1, NODE_1, NODE_2);
00051   setE (VSRC_1, getPropertyDouble ("U1"));
00052 }
00053 
00054 void vpulse::initAC (void) {
00055   initDC ();
00056   setE (VSRC_1, 0);
00057 }
00058 
00059 void vpulse::initTR (void) {
00060   initDC ();
00061 }
00062 
00063 void vpulse::calcTR (nr_double_t t) {
00064   nr_double_t u1 = getPropertyDouble ("U1");
00065   nr_double_t u2 = getPropertyDouble ("U2");
00066   nr_double_t t1 = getPropertyDouble ("T1");
00067   nr_double_t t2 = getPropertyDouble ("T2");
00068   nr_double_t tr = getPropertyDouble ("Tr");
00069   nr_double_t tf = getPropertyDouble ("Tf");
00070   nr_double_t ut = 0;
00071   nr_double_t s  = getNet()->getSrcFactor ();
00072 
00073   if (t < t1) { // before pulse
00074     ut = u1;
00075   }
00076   else if (t < t1 + tr) { // rising edge
00077     ut = u1 + (u2 - u1) / tr * (t - t1);
00078   }
00079   else if (t < t2 - tf) { // during full pulse
00080     ut = u2;
00081   }
00082   else if (t < t2) { // falling edge
00083     ut = u2 + (u1 - u2) / tf * (t - (t2 - tf));
00084   }
00085   else { // after pulse
00086     ut = u1;
00087   }
00088   setE (VSRC_1, ut * s);
00089 }
00090 
00091 // properties
00092 PROP_REQ [] = {
00093   { "U1", PROP_REAL, { 0, PROP_NO_STR }, PROP_NO_RANGE },
00094   { "U2", PROP_REAL, { 1, PROP_NO_STR }, PROP_NO_RANGE },
00095   { "T1", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE },
00096   { "T2", PROP_REAL, { 1e-3, PROP_NO_STR }, PROP_POS_RANGE },
00097   PROP_NO_PROP };
00098 PROP_OPT [] = {
00099   { "Tr", PROP_REAL, { 1e-9, PROP_NO_STR }, PROP_POS_RANGE },
00100   { "Tf", PROP_REAL, { 1e-9, PROP_NO_STR }, PROP_POS_RANGE },
00101   PROP_NO_PROP };
00102 struct define_t vpulse::cirdef =
00103   { "Vpulse", 2, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };