Qucs-core  0.0.19
dcfeed.cpp
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00001 /*
00002  * dcfeed.cpp - DC feed 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 "dcfeed.h"
00031 
00032 using namespace qucs;
00033 
00034 dcfeed::dcfeed () : circuit (2) {
00035   type = CIR_DCFEED;
00036 }
00037 
00038 void dcfeed::initSP (void) {
00039   allocMatrixS ();
00040   setS (NODE_1, NODE_1, 1.0);
00041   setS (NODE_2, NODE_2, 1.0);
00042   setS (NODE_1, NODE_2, 0.0);
00043   setS (NODE_2, NODE_1, 0.0);
00044 }
00045 
00046 void dcfeed::initDC (void) {
00047   setVoltageSources (1);
00048   allocMatrixMNA ();
00049   voltageSource (VSRC_1, NODE_1, NODE_2);
00050 }
00051 
00052 void dcfeed::initAC (void) {
00053   setVoltageSources (0);
00054   allocMatrixMNA ();
00055 }
00056 
00057 #define fState 0 // flux state
00058 #define vState 1 // voltage state
00059 
00060 void dcfeed::initTR (void) {
00061   initDC ();
00062   setStates (2);
00063 }
00064 
00065 void dcfeed::calcTR (nr_double_t) {
00066   nr_double_t l = getPropertyDouble ("L");
00067   nr_double_t r, v;
00068   nr_double_t i = real (getJ (VSRC_1));
00069 
00070   setState (fState, i * l);
00071   integrate (fState, l, r, v);
00072   setD (VSRC_1, VSRC_1, -r);
00073   setE (VSRC_1, v);
00074 }
00075 
00076 // properties
00077 PROP_REQ [] = {
00078   PROP_NO_PROP };
00079 PROP_OPT [] = {
00080   { "L", PROP_REAL, { 1e-6, PROP_NO_STR }, PROP_POS_RANGE },
00081   PROP_NO_PROP };
00082 struct define_t dcfeed::cirdef =
00083   { "DCFeed", 2, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };