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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  * $Id$
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 using namespace qucs;
34 
35 logicnand::logicnand () : digital () {
36  type = CIR_NAND;
37  setVariableSized (true);
38 }
39 
40 void logicnand::calcOutput (void) {
41  nr_double_t v = getPropertyDouble ("V");
42  nr_double_t n = getSize () - 1;
43  nr_double_t x;
44  for (x = 0, i = 0; i < n; i++) {
45  x += 2 / (1 + calcTransfer (i));
46  }
47  Vout = v * (1 - n / x);
48 }
49 
51  nr_double_t n = getSize () - 1;
52  nr_double_t x;
53  for (int k = 0; k < n; k++) {
54  for (x = 0, i = 0; i < n; i++) {
55  x += 2 / (1 + calcTransfer (i));
56  }
57  x *= (1 + calcTransfer (k));
58  g[k] = -2 * n * calcDerivative (k) / x / x;
59  }
60 }
61 
62 // properties
63 PROP_REQ [] = {
64  { "V", PROP_REAL, { 1, PROP_NO_STR }, PROP_POS_RANGE }, PROP_NO_PROP };
65 PROP_OPT [] = {
66  { "t", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE },
67  { "TR", PROP_REAL, { 10, PROP_NO_STR }, PROP_RNGII (1, 100) },
68  PROP_NO_PROP };
69 struct define_t logicnand::cirdef =
70  { "NAND",
void calcDerivatives(void)
Definition: nand.cpp:50
#define PROP_POS_RANGE
Definition: netdefs.h:129
#define PROP_RNGII(f, t)
Definition: netdefs.h:138
#define PROP_DEF
Definition: netdefs.h:189
nr_double_t getPropertyDouble(const char *)
Definition: object.cpp:176
#define PROP_REAL
Definition: netdefs.h:174
#define PROP_NO_PROP
Definition: netdefs.h:122
nr_double_t Vout
Definition: digital.h:54
#define PROP_NO_STR
Definition: netdefs.h:125
n
Definition: parse_citi.y:147
void calcOutput(void)
Definition: nand.cpp:40
int getSize(void)
Get the number of ports the circuit element has.
Definition: circuit.h:143
#define PROP_NODES
Definition: netdefs.h:121
PROP_OPT[]
Definition: nand.cpp:65
#define PROP_COMPONENT
Definition: netdefs.h:116
nr_double_t calcDerivative(int)
Definition: digital.cpp:103
PROP_NONLINEAR
Definition: nand.cpp:70
x
Definition: parse_mdl.y:498
int i
Definition: digital.h:55
v
Definition: parse_zvr.y:141
nr_double_t calcTransfer(int)
Definition: digital.cpp:90
void setVariableSized(bool v)
Definition: circuit.h:169
PROP_REQ[]
Definition: nand.cpp:63
nr_double_t * g
Definition: digital.h:53
#define PROP_NO_SUBSTRATE
Definition: netdefs.h:118