Qucs-core  0.0.19
dcblock.cpp
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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 };