Qucs-core  0.0.19
iac.cpp
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00001 /*
00002  * iac.cpp - AC current source class implementation
00003  *
00004  * Copyright (C) 2004, 2006, 2007, 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 "iac.h"
00031 
00032 using namespace qucs;
00033 
00034 iac::iac () : circuit (2) {
00035   type = CIR_IAC;
00036   setISource (true);
00037 }
00038 
00039 void iac::initSP (void) {
00040   allocMatrixS ();
00041   setS (NODE_1, NODE_1, 1.0);
00042   setS (NODE_1, NODE_2, 0.0);
00043   setS (NODE_2, NODE_1, 0.0);
00044   setS (NODE_2, NODE_2, 1.0);
00045 }
00046 
00047 void iac::initDC (void) {
00048   allocMatrixMNA ();
00049   clearI ();
00050 }
00051 
00052 void iac::initAC (void) {
00053   nr_double_t a = getPropertyDouble ("I");
00054   nr_double_t p = getPropertyDouble ("Phase");
00055   nr_complex_t i = qucs::polar (a, deg2rad (p));
00056   allocMatrixMNA ();
00057   setI (NODE_1, +i); setI (NODE_2, -i);
00058 }
00059 
00060 void iac::calcTR (nr_double_t t) {
00061   nr_double_t f = getPropertyDouble ("f");
00062   nr_double_t p = getPropertyDouble ("Phase");
00063   nr_double_t d = getPropertyDouble ("Theta");
00064   nr_double_t a = getPropertyDouble ("I");
00065   nr_double_t s = getNet()->getSrcFactor ();
00066   nr_double_t o = 2 * pi * f;
00067   nr_double_t T = p / f / 360;
00068   nr_double_t i = s * a * std::exp (-(t + T) * d * f) * std::sin (o * t + deg2rad (p));
00069   setI (NODE_1, +i); setI (NODE_2, -i);
00070 }
00071 
00072 // properties
00073 PROP_REQ [] = {
00074   { "I", PROP_REAL, { 1e-3, PROP_NO_STR }, PROP_NO_RANGE }, PROP_NO_PROP };
00075 PROP_OPT [] = {
00076   { "Phase", PROP_REAL, { 0, PROP_NO_STR }, PROP_RNGII (-360, 360) },
00077   { "Theta", PROP_REAL, { 0, PROP_NO_STR }, PROP_POS_RANGE },
00078   { "f", PROP_REAL, { 1e9, PROP_NO_STR }, PROP_POS_RANGE },
00079   PROP_NO_PROP };
00080 struct define_t iac::cirdef =
00081   { "Iac", 2, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };