Qucs-core  0.0.19
biastee.cpp
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00001 /*
00002  * biastee.cpp - bias T 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 "biastee.h"
00031 
00032 using namespace qucs;
00033 
00034 biastee::biastee () : circuit (3) {
00035   type = CIR_BIASTEE;
00036 }
00037 
00038 void biastee::initSP (void) {
00039   allocMatrixS ();
00040   setS (NODE_1, NODE_1, 0.0);
00041   setS (NODE_1, NODE_2, 1.0);
00042   setS (NODE_1, NODE_3, 0.0);
00043   setS (NODE_2, NODE_1, 1.0);
00044   setS (NODE_2, NODE_2, 0.0);
00045   setS (NODE_2, NODE_3, 0.0);
00046   setS (NODE_3, NODE_1, 0.0);
00047   setS (NODE_3, NODE_2, 0.0);
00048   setS (NODE_3, NODE_3, 1.0);
00049 }
00050 
00051 void biastee::initDC (void) {
00052   setISource (false);
00053   setVoltageSources (1);
00054   allocMatrixMNA ();
00055   clearB ();
00056   clearC ();
00057   voltageSource (VSRC_1, NODE_2, NODE_3);
00058 }
00059 
00060 void biastee::initAC (void) {
00061   setISource (false);
00062   setVoltageSources (1);
00063   allocMatrixMNA ();
00064   clearB ();
00065   clearC ();
00066   voltageSource (VSRC_1, NODE_2, NODE_1);
00067 }
00068 
00069 #define fState 0 // flux state
00070 #define vState 1 // voltage state
00071 #define qState 2 // charge state
00072 #define cState 3 // current state
00073 
00074 void biastee::initTR (void) {
00075   initDC ();
00076   setStates (4);
00077   setISource (true);
00078 }
00079 
00080 void biastee::calcTR (nr_double_t) {
00081   nr_double_t l = getPropertyDouble ("L");
00082   nr_double_t c = getPropertyDouble ("C");
00083   nr_double_t g, r, v;
00084   nr_double_t i = real (getJ (VSRC_1));
00085 
00086   setState (fState, i * l);
00087   integrate (fState, l, r, v);
00088   setD (VSRC_1, VSRC_1, -r);
00089   setE (VSRC_1, v);
00090 
00091   v = real (getV (NODE_1) - getV (NODE_2));
00092   setState (qState, c * v);
00093   integrate (qState, c, g, i);
00094   setY (NODE_1, NODE_1, +g); setY (NODE_2, NODE_2, +g);
00095   setY (NODE_1, NODE_2, -g); setY (NODE_2, NODE_1, -g);
00096   setI (NODE_1 , -i);
00097   setI (NODE_2 , +i);
00098 }
00099 
00100 // properties
00101 PROP_REQ [] = {
00102   PROP_NO_PROP };
00103 PROP_OPT [] = {
00104   { "C", PROP_REAL, { 1e-6, PROP_NO_STR }, PROP_POS_RANGE },
00105   { "L", PROP_REAL, { 1e-6, PROP_NO_STR }, PROP_POS_RANGE },
00106   PROP_NO_PROP };
00107 struct define_t biastee::cirdef =
00108   { "BiasT", 3, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };