Qucs-core  0.0.19
isolator.cpp
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00001 /*
00002  * isolator.cpp - isolator 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 "isolator.h"
00031 
00032 using namespace qucs;
00033 
00034 isolator::isolator () : circuit (2) {
00035   type = CIR_ISOLATOR;
00036 }
00037 
00038 void isolator::initSP (void) {
00039   nr_double_t z1 = getPropertyDouble ("Z1");
00040   nr_double_t z2 = getPropertyDouble ("Z2");
00041   nr_double_t s1 = (z1 - z0) / (z1 + z0);
00042   nr_double_t s2 = (z2 - z0) / (z2 + z0);
00043   allocMatrixS ();
00044   setS (NODE_1, NODE_1, s1);
00045   setS (NODE_2, NODE_2, s2);
00046   setS (NODE_1, NODE_2, 0);
00047   setS (NODE_2, NODE_1, std::sqrt (1 - s1 * s1) * std::sqrt (1 - s2 * s2));
00048 }
00049 
00050 void isolator::calcNoiseSP (nr_double_t) {
00051   nr_double_t T = getPropertyDouble ("Temp");
00052   nr_double_t z1 = getPropertyDouble ("Z1");
00053   nr_double_t z2 = getPropertyDouble ("Z2");
00054   nr_double_t r = (z0 - z1) / (z0 + z2);
00055   nr_double_t f = 4 * z0 / sqr (z1 + z0) * celsius2kelvin (T) / T0;
00056   setN (NODE_1, NODE_1, f * z1);
00057   setN (NODE_1, NODE_2, f * std::sqrt (z1 * z2) * r);
00058   setN (NODE_2, NODE_1, f * std::sqrt (z1 * z2) * r);
00059   setN (NODE_2, NODE_2, f * z2 * r * r);
00060 }
00061 
00062 void isolator::calcNoiseAC (nr_double_t) {
00063   nr_double_t T = getPropertyDouble ("Temp");
00064   nr_double_t z1 = getPropertyDouble ("Z1");
00065   nr_double_t z2 = getPropertyDouble ("Z2");
00066   nr_double_t f = 4 * celsius2kelvin (T) / T0;
00067   setN (NODE_1, NODE_1, +f / z1);
00068   setN (NODE_1, NODE_2, 0);
00069   setN (NODE_2, NODE_1, -f * 2 / std::sqrt (z1 * z2));
00070   setN (NODE_2, NODE_2, +f / z2);
00071 }
00072 
00073 void isolator::initDC (void) {
00074   nr_double_t z1 = getPropertyDouble ("Z1");
00075   nr_double_t z2 = getPropertyDouble ("Z2");
00076 #if AUGMENTED
00077   nr_double_t z21 = 2 * std::sqrt (z1 * z2);
00078   setVoltageSources (2);
00079   allocMatrixMNA ();
00080   setB (NODE_1, VSRC_1, +1.0); setB (NODE_1, VSRC_2, +0.0);
00081   setB (NODE_2, VSRC_1, +0.0); setB (NODE_2, VSRC_2, +1.0);
00082   setC (VSRC_1, NODE_1, -1.0); setC (VSRC_1, NODE_2, +0.0);
00083   setC (VSRC_2, NODE_1, +0.0); setC (VSRC_2, NODE_2, -1.0);
00084   setD (VSRC_1, VSRC_1,  +z1); setD (VSRC_2, VSRC_2,  +z2);
00085   setD (VSRC_1, VSRC_2, +0.0); setD (VSRC_2, VSRC_1, +z21);
00086   setE (VSRC_1, +0.0); setE (VSRC_2, +0.0);
00087 #else
00088   setVoltageSources (0);
00089   allocMatrixMNA ();
00090   setY (NODE_1, NODE_1, 1 / z1);
00091   setY (NODE_1, NODE_2, 0);
00092   setY (NODE_2, NODE_1, -2 / std::sqrt (z1 * z2));
00093   setY (NODE_2, NODE_2, 1 / z2);
00094 #endif
00095 }
00096 
00097 void isolator::initAC (void) {
00098   initDC ();
00099 }
00100 
00101 void isolator::initTR (void) {
00102   initDC ();
00103 }
00104 
00105 // properties
00106 PROP_REQ [] = {
00107   PROP_NO_PROP };
00108 PROP_OPT [] = {
00109   { "Temp", PROP_REAL, { 26.85, PROP_NO_STR }, PROP_MIN_VAL (K) },
00110   { "Z1", PROP_REAL, { 50, PROP_NO_STR }, PROP_POS_RANGE },
00111   { "Z2", PROP_REAL, { 50, PROP_NO_STR }, PROP_POS_RANGE },
00112   PROP_NO_PROP };
00113 struct define_t isolator::cirdef =
00114   { "Isolator", 2, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };