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nand.cpp
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1 /*
2  * nand.cpp - logical nand class implementation
3  *
4  * Copyright (C) 2005, 2009 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: nand.cpp 1825 2011-03-11 20:42:14Z ela $
22  *
23  */
24 
25 #if HAVE_CONFIG_H
26 # include <config.h>
27 #endif
28 
29 #include "component.h"
30 #include "digital.h"
31 #include "nand.h"
32 
33 logicnand::logicnand () : digital () {
34  type = CIR_NAND;
35  setVariableSized (true);
36 }
37 
38 void logicnand::calcOutput (void) {
39  nr_double_t v = getPropertyDouble ("V");
40  nr_double_t n = getSize () - 1;
41  nr_double_t x;
42  for (x = 0, i = 0; i < n; i++) {
43  x += 2 / (1 + calcTransfer (i));
44  }
45  Vout = v * (1 - n / x);
46 }
47 
49  nr_double_t n = getSize () - 1;
50  nr_double_t x;
51  for (int k = 0; k < n; k++) {
52  for (x = 0, i = 0; i < n; i++) {
53  x += 2 / (1 + calcTransfer (i));
54  }
55  x *= (1 + calcTransfer (k));
56  g[k] = -2 * n * calcDerivative (k) / x / x;
57  }
58 }
59 
60 // properties
61 PROP_REQ [] = {
62  { "V", PROP_REAL, { 1, PROP_NO_STR }, PROP_POS_RANGE }, PROP_NO_PROP };
63 PROP_OPT [] = {
64  { "t", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE },
65  { "TR", PROP_REAL, { 10, PROP_NO_STR }, PROP_RNGII (1, 100) },
66  PROP_NO_PROP };
67 struct define_t logicnand::cirdef =
68  { "NAND",