/*
 * itrafo.cpp - ideal trafo class implementation
 *
 * Copyright (C) 2003, 2004, 2008 Stefan Jahn <stefan@lkcc.org>
 *
 * This is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this package; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * $Id$
 *
 */

#if HAVE_CONFIG_H
# include <config.h>
#endif

#include "component.h"
#include "itrafo.h"

using namespace qucs;

itrafo::itrafo () : circuit (3) {
  type = CIR_ITRAFO;
}

void itrafo::initSP (void) {
  allocMatrixS ();
  nr_double_t z = getPropertyDouble ("Z");
  nr_double_t n = 2 * z0 + z;
  setS (NODE_1, NODE_1,  (2.0 * z0 - z) / n);
  setS (NODE_1, NODE_2,  (2.0 * std::sqrt (z0 * z)) / n);
  setS (NODE_1, NODE_3, -(2.0 * std::sqrt (z0 * z)) / n);
  setS (NODE_2, NODE_1,  (2.0 * std::sqrt (z0 * z)) / n);
  setS (NODE_2, NODE_2,  (z) / n);
  setS (NODE_2, NODE_3,  (2.0 * z0) / n);
  setS (NODE_3, NODE_1, -(2.0 * std::sqrt (z0 * z)) / n);
  setS (NODE_3, NODE_2,  (2.0 * z0) / n);
  setS (NODE_3, NODE_3,  (z) / n);
}