Qucs-core
0.0.19
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00001 /* 00002 * xor.cpp - logical xor class implementation 00003 * 00004 * Copyright (C) 2005, 2006, 2009 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 "digital.h" 00031 #include "xor.h" 00032 00033 using namespace qucs; 00034 00035 logicxor::logicxor () : digital () { 00036 type = CIR_XOR; 00037 setVariableSized (true); 00038 } 00039 00040 void logicxor::calcOutput (void) { 00041 nr_double_t v = getPropertyDouble ("V"); 00042 nr_double_t n = getSize () - 1; 00043 nr_double_t x; 00044 for (x = 1, i = 0; i < n; i++) { 00045 x *= -calcTransferX (i); 00046 } 00047 Vout = v / 2 * (1 - x); 00048 } 00049 00050 void logicxor::calcDerivatives (void) { 00051 nr_double_t n = getSize () - 1; 00052 nr_double_t x; 00053 for (int k = 0; k < n; k++) { 00054 for (x = 1, i = 0; i < n; i++) { 00055 if (i != k) x *= -calcTransferX (i); 00056 } 00057 g[k] = 0.5 * calcDerivativeX (k) * x; 00058 } 00059 } 00060 00061 // properties 00062 PROP_REQ [] = { 00063 { "V", PROP_REAL, { 1, PROP_NO_STR }, PROP_POS_RANGE }, PROP_NO_PROP }; 00064 PROP_OPT [] = { 00065 { "t", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE }, 00066 { "TR", PROP_REAL, { 10, PROP_NO_STR }, PROP_RNGII (1, 100) }, 00067 PROP_NO_PROP }; 00068 struct define_t logicxor::cirdef = 00069 { "XOR", 00070 PROP_NODES, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_NONLINEAR, PROP_DEF };