Qucs-core
0.0.19
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00001 /* 00002 * irect.cpp - rectangular 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 "irect.h" 00031 00032 using namespace qucs; 00033 00034 irect::irect () : circuit (2) { 00035 type = CIR_IRECT; 00036 setISource (true); 00037 } 00038 00039 void irect::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 irect::initDC (void) { 00048 nr_double_t th = getPropertyDouble ("TH"); 00049 nr_double_t tl = getPropertyDouble ("TL"); 00050 nr_double_t tr = getPropertyDouble ("Tr"); 00051 nr_double_t tf = getPropertyDouble ("Tf"); 00052 if (tr > th) tr = th; 00053 if (tf > tl) tf = tl; 00054 nr_double_t a = (th + (tf - tr) / 2) / (th + tl); 00055 nr_double_t i = getPropertyDouble ("I") * a; 00056 allocMatrixMNA (); 00057 setI (NODE_1, +i); setI (NODE_2, -i); 00058 } 00059 00060 void irect::initAC (void) { 00061 allocMatrixMNA (); 00062 clearI (); 00063 } 00064 00065 void irect::initTR (void) { 00066 initDC (); 00067 } 00068 00069 void irect::calcTR (nr_double_t t) { 00070 nr_double_t i = getPropertyDouble ("I"); 00071 nr_double_t th = getPropertyDouble ("TH"); 00072 nr_double_t tl = getPropertyDouble ("TL"); 00073 nr_double_t tr = getPropertyDouble ("Tr"); 00074 nr_double_t tf = getPropertyDouble ("Tf"); 00075 nr_double_t td = getPropertyDouble ("Td"); 00076 nr_double_t it = 0; 00077 nr_double_t s = getNet()->getSrcFactor (); 00078 00079 if (tr > th) tr = th; 00080 if (tf > tl) tf = tl; 00081 00082 if (t > td) { // after delay 00083 t = t - td; 00084 t = t - (th + tl) * qucs::floor (t / (th + tl)); 00085 if (t < tr) { // rising edge 00086 it = + i / tr * t; 00087 } 00088 else if (t < th) { // high pulse 00089 it = i; 00090 } 00091 else if (t < th + tf) { // falling edge 00092 it = - i / tf * (t - (th + tf)); 00093 } 00094 } 00095 setI (NODE_1, +it * s); setI (NODE_2, -it * s); 00096 } 00097 00098 // properties 00099 PROP_REQ [] = { 00100 { "I", PROP_REAL, { 1e-3, PROP_NO_STR }, PROP_NO_RANGE }, 00101 { "TH", PROP_REAL, { 1e-3, PROP_NO_STR }, PROP_POS_RANGE }, 00102 { "TL", PROP_REAL, { 1e-3, PROP_NO_STR }, PROP_POS_RANGE }, 00103 PROP_NO_PROP }; 00104 PROP_OPT [] = { 00105 { "Tr", PROP_REAL, { 1e-9, PROP_NO_STR }, PROP_POS_RANGE }, 00106 { "Tf", PROP_REAL, { 1e-9, PROP_NO_STR }, PROP_POS_RANGE }, 00107 { "Td", PROP_REAL, { 0, PROP_NO_STR }, PROP_NO_RANGE }, 00108 PROP_NO_PROP }; 00109 struct define_t irect::cirdef = 00110 { "Irect", 2, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };