Qucs-core
0.0.19
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00001 /* 00002 * ipulse.cpp - pulse current source class implementation 00003 * 00004 * Copyright (C) 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 "ipulse.h" 00031 00032 using namespace qucs; 00033 00034 ipulse::ipulse () : circuit (2) { 00035 type = CIR_IPULSE; 00036 setISource (true); 00037 } 00038 00039 void ipulse::initSP (void) { 00040 allocMatrixS (); 00041 setS (NODE_1, NODE_1, 1.0); 00042 setS (NODE_1, NODE_2, 0.0); 00043 setS (NODE_2, NODE_1, 0.0); 00044 setS (NODE_2, NODE_2, 1.0); 00045 } 00046 00047 void ipulse::initDC (void) { 00048 nr_double_t i = getPropertyDouble ("I1"); 00049 allocMatrixMNA (); 00050 setI (NODE_1, +i); setI (NODE_2, -i); 00051 } 00052 00053 void ipulse::initAC (void) { 00054 allocMatrixMNA (); 00055 clearI (); 00056 } 00057 00058 void ipulse::initTR (void) { 00059 initDC (); 00060 } 00061 00062 void ipulse::calcTR (nr_double_t t) { 00063 nr_double_t i1 = getPropertyDouble ("I1"); 00064 nr_double_t i2 = getPropertyDouble ("I2"); 00065 nr_double_t t1 = getPropertyDouble ("T1"); 00066 nr_double_t t2 = getPropertyDouble ("T2"); 00067 nr_double_t tr = getPropertyDouble ("Tr"); 00068 nr_double_t tf = getPropertyDouble ("Tf"); 00069 nr_double_t it = 0; 00070 nr_double_t s = getNet()->getSrcFactor (); 00071 00072 if (t < t1) { // before pulse 00073 it = i1; 00074 } 00075 else if (t >= t1 && t < t1 + tr) { // rising edge 00076 it = i1 + (i2 - i1) / tr * (t - t1); 00077 } 00078 else if (t >= t1 + tr && t < t2 - tf) { // during full pulse 00079 it = i2; 00080 } 00081 else if (t >= t2 - tf && t < t2) { // falling edge 00082 it = i2 + (i1 - i2) / tf * (t - (t2 - tf)); 00083 } 00084 else { // after pulse 00085 it = i1; 00086 } 00087 setI (NODE_1, +it * s); setI (NODE_2, -it * s); 00088 } 00089 00090 // properties 00091 PROP_REQ [] = { 00092 { "I1", PROP_REAL, { 0, PROP_NO_STR }, PROP_NO_RANGE }, 00093 { "I2", PROP_REAL, { 1, PROP_NO_STR }, PROP_NO_RANGE }, 00094 { "T1", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE }, 00095 { "T2", PROP_REAL, { 1e-3, PROP_NO_STR }, PROP_POS_RANGE }, 00096 PROP_NO_PROP }; 00097 PROP_OPT [] = { 00098 { "Tr", PROP_REAL, { 1e-9, PROP_NO_STR }, PROP_POS_RANGE }, 00099 { "Tf", PROP_REAL, { 1e-9, PROP_NO_STR }, PROP_POS_RANGE }, 00100 PROP_NO_PROP }; 00101 struct define_t ipulse::cirdef = 00102 { "Ipulse", 2, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };