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       1                 :            : /*
       2                 :            :  * inoise.cpp - noise current source class implementation
       3                 :            :  *
       4                 :            :  * Copyright (C) 2004, 2005, 2008 Stefan Jahn <stefan@lkcc.org>
       5                 :            :  *
       6                 :            :  * This is free software; you can redistribute it and/or modify
       7                 :            :  * it under the terms of the GNU General Public License as published by
       8                 :            :  * the Free Software Foundation; either version 2, or (at your option)
       9                 :            :  * any later version.
      10                 :            :  *
      11                 :            :  * This software is distributed in the hope that it will be useful,
      12                 :            :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13                 :            :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14                 :            :  * GNU General Public License for more details.
      15                 :            :  *
      16                 :            :  * You should have received a copy of the GNU General Public License
      17                 :            :  * along with this package; see the file COPYING.  If not, write to
      18                 :            :  * the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
      19                 :            :  * Boston, MA 02110-1301, USA.
      20                 :            :  *
      21                 :            :  * $Id$
      22                 :            :  *
      23                 :            :  */
      24                 :            : 
      25                 :            : #if HAVE_CONFIG_H
      26                 :            : # include <config.h>
      27                 :            : #endif
      28                 :            : 
      29                 :            : #include "component.h"
      30                 :            : #include "inoise.h"
      31                 :            : 
      32                 :            : using namespace qucs;
      33                 :            : 
      34                 :          0 : inoise::inoise () : circuit (2) {
      35                 :          0 :   type = CIR_INOISE;
      36                 :          0 : }
      37                 :            : 
      38                 :          0 : void inoise::initSP (void) {
      39                 :          0 :   allocMatrixS ();
      40         [ #  # ]:          0 :   setS (NODE_1, NODE_1, 1.0);
      41         [ #  # ]:          0 :   setS (NODE_1, NODE_2, 0.0);
      42         [ #  # ]:          0 :   setS (NODE_2, NODE_1, 0.0);
      43         [ #  # ]:          0 :   setS (NODE_2, NODE_2, 1.0);
      44                 :          0 : }
      45                 :            : 
      46                 :          0 : void inoise::calcNoiseSP (nr_double_t frequency) {
      47                 :          0 :   nr_double_t i = getPropertyDouble ("i");
      48                 :          0 :   nr_double_t e = getPropertyDouble ("e");
      49                 :          0 :   nr_double_t c = getPropertyDouble ("c");
      50                 :          0 :   nr_double_t a = getPropertyDouble ("a");
      51                 :          0 :   nr_double_t ipsd = i / (a + c * qucs::pow (frequency, e)) / kB / T0 * z0;
      52 [ #  # ][ #  # ]:          0 :   setN (NODE_1, NODE_1, +ipsd); setN (NODE_2, NODE_2, +ipsd);
      53 [ #  # ][ #  # ]:          0 :   setN (NODE_1, NODE_2, -ipsd); setN (NODE_2, NODE_1, -ipsd);
      54                 :          0 : }
      55                 :            : 
      56                 :          0 : void inoise::calcNoiseAC (nr_double_t frequency) {
      57                 :          0 :   nr_double_t i = getPropertyDouble ("i");
      58                 :          0 :   nr_double_t e = getPropertyDouble ("e");
      59                 :          0 :   nr_double_t c = getPropertyDouble ("c");
      60                 :          0 :   nr_double_t a = getPropertyDouble ("a");
      61                 :          0 :   nr_double_t ipsd = i / (a + c * qucs::pow (frequency, e)) / kB / T0;
      62 [ #  # ][ #  # ]:          0 :   setN (NODE_1, NODE_1, +ipsd); setN (NODE_2, NODE_2, +ipsd);
      63 [ #  # ][ #  # ]:          0 :   setN (NODE_1, NODE_2, -ipsd); setN (NODE_2, NODE_1, -ipsd);
      64                 :          0 : }
      65                 :            : 
      66                 :            : // properties
      67                 :            : PROP_REQ [] = {
      68                 :            :   { "i", PROP_REAL, { 1e-6, PROP_NO_STR }, PROP_POS_RANGE },
      69                 :            :   PROP_NO_PROP };
      70                 :            : PROP_OPT [] = {
      71                 :            :   { "a", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE },
      72                 :            :   { "c", PROP_REAL, { 1, PROP_NO_STR }, PROP_POS_RANGE },
      73                 :            :   { "e", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE },
      74                 :            :   PROP_NO_PROP };
      75                 :            : struct define_t inoise::cirdef =
      76                 :            :   { "Inoise", 2, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };