Qucs-core
0.0.19
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00001 /* 00002 * dcblock.cpp - DC block class implementation 00003 * 00004 * Copyright (C) 2003, 2004, 2005, 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 "dcblock.h" 00031 00032 using namespace qucs; 00033 00034 dcblock::dcblock () : circuit (2) { 00035 type = CIR_DCBLOCK; 00036 } 00037 00038 void dcblock::initSP (void) { 00039 allocMatrixS (); 00040 setS (NODE_1, NODE_1, 0.0); 00041 setS (NODE_2, NODE_2, 0.0); 00042 setS (NODE_1, NODE_2, 1.0); 00043 setS (NODE_2, NODE_1, 1.0); 00044 } 00045 00046 void dcblock::initDC (void) { 00047 setISource (false); 00048 setVoltageSources (0); 00049 allocMatrixMNA (); 00050 } 00051 00052 void dcblock::initAC (void) { 00053 setISource (false); 00054 setVoltageSources (1); 00055 allocMatrixMNA (); 00056 voltageSource (VSRC_1, NODE_1, NODE_2); 00057 } 00058 00059 #define qState 0 // charge state 00060 #define cState 1 // current state 00061 00062 void dcblock::initTR (void) { 00063 setStates (2); 00064 initDC (); 00065 setISource (true); 00066 } 00067 00068 void dcblock::calcTR (nr_double_t) { 00069 nr_double_t c = getPropertyDouble ("C"); 00070 nr_double_t g, i; 00071 nr_double_t v = real (getV (NODE_1) - getV (NODE_2)); 00072 00073 setState (qState, c * v); 00074 integrate (qState, c, g, i); 00075 setY (NODE_1, NODE_1, +g); setY (NODE_2, NODE_2, +g); 00076 setY (NODE_1, NODE_2, -g); setY (NODE_2, NODE_1, -g); 00077 setI (NODE_1 , -i); 00078 setI (NODE_2 , +i); 00079 } 00080 00081 // properties 00082 PROP_REQ [] = { 00083 PROP_NO_PROP }; 00084 PROP_OPT [] = { 00085 { "C", PROP_REAL, { 1e-6, PROP_NO_STR }, PROP_POS_RANGE }, 00086 PROP_NO_PROP }; 00087 struct define_t dcblock::cirdef = 00088 { "DCBlock", 2, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };