Qucs-core
0.0.19
|
00001 /* 00002 * vnoise.cpp - noise voltage source class implementation 00003 * 00004 * Copyright (C) 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 "vnoise.h" 00031 00032 using namespace qucs; 00033 00034 vnoise::vnoise () : circuit (2) { 00035 type = CIR_VNOISE; 00036 setVoltageSources (1); 00037 } 00038 00039 void vnoise::initSP (void) { 00040 allocMatrixS (); 00041 setS (NODE_1, NODE_1, 0.0); 00042 setS (NODE_1, NODE_2, 1.0); 00043 setS (NODE_2, NODE_1, 1.0); 00044 setS (NODE_2, NODE_2, 0.0); 00045 } 00046 00047 void vnoise::calcNoiseSP (nr_double_t frequency) { 00048 nr_double_t u = getPropertyDouble ("u"); 00049 nr_double_t e = getPropertyDouble ("e"); 00050 nr_double_t c = getPropertyDouble ("c"); 00051 nr_double_t a = getPropertyDouble ("a"); 00052 nr_double_t vpsd = u / (a + c * qucs::pow (frequency, e)) / kB / T0 / 4 / z0; 00053 setN (NODE_1, NODE_1, +vpsd); setN (NODE_2, NODE_2, +vpsd); 00054 setN (NODE_1, NODE_2, -vpsd); setN (NODE_2, NODE_1, -vpsd); 00055 } 00056 00057 void vnoise::initDC (void) { 00058 allocMatrixMNA (); 00059 voltageSource (VSRC_1, NODE_1, NODE_2); 00060 } 00061 00062 void vnoise::initTR (void) { 00063 initDC (); 00064 } 00065 00066 void vnoise::initAC (void) { 00067 initDC (); 00068 } 00069 00070 void vnoise::calcNoiseAC (nr_double_t frequency) { 00071 nr_double_t u = getPropertyDouble ("u"); 00072 nr_double_t e = getPropertyDouble ("e"); 00073 nr_double_t c = getPropertyDouble ("c"); 00074 nr_double_t a = getPropertyDouble ("a"); 00075 nr_double_t ipsd = u / (a + c * qucs::pow (frequency, e)) / kB / T0; 00076 setN (NODE_3, NODE_3, +ipsd); 00077 } 00078 00079 // properties 00080 PROP_REQ [] = { 00081 { "u", PROP_REAL, { 1e-6, PROP_NO_STR }, PROP_POS_RANGE }, 00082 PROP_NO_PROP }; 00083 PROP_OPT [] = { 00084 { "a", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE }, 00085 { "c", PROP_REAL, { 1, PROP_NO_STR }, PROP_POS_RANGE }, 00086 { "e", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE }, 00087 PROP_NO_PROP }; 00088 struct define_t vnoise::cirdef = 00089 { "Vnoise", 2, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };