Qucs-core  0.0.19
pac.cpp
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00001 /*
00002  * pac.cpp - AC power source class implementation
00003  *
00004  * Copyright (C) 2003, 2004, 2005, 2006 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 "pac.h"
00031 
00032 using namespace qucs;
00033 
00034 pac::pac () : circuit (2) {
00035   type = CIR_PAC;
00036   setISource (true);
00037 }
00038 
00039 void pac::calcSP (nr_double_t) {
00040   nr_double_t z = getPropertyDouble ("Z") / z0;
00041   setS (NODE_1, NODE_1, z / (z + 2));
00042   setS (NODE_2, NODE_2, z / (z + 2));
00043   setS (NODE_1, NODE_2, 2 / (z + 2));
00044   setS (NODE_2, NODE_1, 2 / (z + 2));
00045 }
00046 
00047 void pac::calcNoiseSP (nr_double_t) {
00048   nr_double_t r = getPropertyDouble ("Z");
00049   nr_double_t T = getPropertyDouble ("Temp");
00050   nr_double_t f = celsius2kelvin (T) * 4.0 * r * z0 / qucs::sqr (2.0 * z0 + r) / T0;
00051   setN (NODE_1, NODE_1, +f); setN (NODE_2, NODE_2, +f);
00052   setN (NODE_1, NODE_2, -f); setN (NODE_2, NODE_1, -f);
00053 }
00054 
00055 void pac::calcDC (void) {
00056   nr_double_t g = 1.0 / getPropertyDouble ("Z");
00057   clearI ();
00058   setY (NODE_1, NODE_1, +g); setY (NODE_2, NODE_2, +g);
00059   setY (NODE_1, NODE_2, -g); setY (NODE_2, NODE_1, -g);
00060 }
00061 
00062 void pac::calcAC (nr_double_t) {
00063   nr_double_t p = getPropertyDouble ("P");
00064   nr_double_t r = getPropertyDouble ("Z");
00065   nr_double_t i = std::sqrt (8 * p / r);
00066   calcDC ();
00067   setI (NODE_1, +i); setI (NODE_2, -i);
00068 }
00069 
00070 void pac::calcNoiseAC (nr_double_t) {
00071   nr_double_t r = getPropertyDouble ("Z");
00072   nr_double_t T = getPropertyDouble ("Temp");
00073   nr_double_t f = celsius2kelvin (T) / T0 * 4.0 / r;
00074   setN (NODE_1, NODE_1, +f); setN (NODE_2, NODE_2, +f);
00075   setN (NODE_1, NODE_2, -f); setN (NODE_2, NODE_1, -f);
00076 }
00077 
00078 void pac::calcTR (nr_double_t t) {
00079   nr_double_t p = getPropertyDouble ("P");
00080   nr_double_t r = getPropertyDouble ("Z");
00081   nr_double_t f = getPropertyDouble ("f");
00082   nr_double_t i = std::sqrt (8 * p / r) * std::sin (2 * pi * f * t);
00083   calcDC ();
00084   setI (NODE_1, +i); setI (NODE_2, -i);
00085 }
00086 
00087 void pac::initHB (void) {
00088   setVoltageSources (1);
00089   allocMatrixMNA ();
00090   voltageSource (VSRC_1, NODE_1, NODE_2);
00091   nr_double_t g = 1.0 / getPropertyDouble ("Z");
00092   setY (NODE_1, NODE_1, +g); setY (NODE_2, NODE_2, +g);
00093   setY (NODE_1, NODE_2, -g); setY (NODE_2, NODE_1, -g);
00094 }
00095 
00096 void pac::calcHB (nr_double_t frequency) {
00097   nr_double_t f = getPropertyDouble ("f");
00098   if (f == frequency) {
00099     nr_double_t p = getPropertyDouble ("P");
00100     nr_double_t r = getPropertyDouble ("Z");
00101     nr_double_t u = std::sqrt (4 * p * r);
00102     setE (VSRC_1, u);
00103   }
00104   else {
00105     setE (VSRC_1, 0);
00106   }
00107 }
00108 
00109 // properties
00110 PROP_REQ [] = {
00111   { "f", PROP_REAL, { 1e9, PROP_NO_STR }, PROP_POS_RANGE },
00112   { "Z", PROP_REAL, { 50, PROP_NO_STR }, PROP_POS_RANGEX },
00113   { "Num", PROP_INT, { 1, PROP_NO_STR }, PROP_RNGII (1, MAX_PORTS) },
00114   PROP_NO_PROP };
00115 PROP_OPT [] = {
00116   { "P", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE },
00117   { "Temp", PROP_REAL, { 26.85, PROP_NO_STR }, PROP_MIN_VAL (K) },
00118   PROP_NO_PROP };
00119 struct define_t pac::cirdef =
00120   { "Pac", 2, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };