1 files changed, 93 insertions, 0 deletions
diff --git a/src/electronics/simulation/vcvs.cpp b/src/electronics/simulation/vcvs.cpp
new file mode 100644
index 0000000..68604df
--- /dev/null
+++ b/src/electronics/simulation/vcvs.cpp
@@ -0,0 +1,93 @@
+/***************************************************************************
+ *   Copyright (C) 2003-2004 by David Saxton                               *
+ *   david@bluehaze.org                                                    *
+ *                                                                         *
+ *   This program 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 of the License, or     *
+ *   (at your option) any later version.                                   *
+ ***************************************************************************/
+
+#include "elementset.h"
+#include "matrix.h"
+#include "vcvs.h"
+
+VCVS::VCVS( const double gain )
+	: Element::Element()
+{
+	m_g = gain;
+	m_numCBranches = 1;
+	m_numCNodes = 4;
+}
+
+
+VCVS::~VCVS()
+{
+}
+
+
+void VCVS::setGain( const double g )
+{
+	if ( g == m_g )
+		return;
+	
+	if (p_eSet)
+		p_eSet->setCacheInvalidated();
+	
+	m_g = -m_g;
+	add_initial_dc();
+
+	m_g = g;
+	add_initial_dc();
+}
+
+
+void VCVS::add_map()
+{
+	if (!b_status)
+		return;
+	
+	if ( !p_cnode[0]->isGround )
+	{
+		p_A->setUse_c( p_cbranch[0]->n(), p_cnode[0]->n(), Map::et_stable, false );
+	}
+	if ( !p_cnode[1]->isGround  )
+	{
+		p_A->setUse_c( p_cbranch[0]->n(), p_cnode[1]->n(), Map::et_stable, false );
+	}
+	if ( !p_cnode[2]->isGround  )
+	{
+		p_A->setUse_b( p_cnode[2]->n(), p_cbranch[0]->n(), Map::et_constant, true );
+		p_A->setUse_c( p_cbranch[0]->n(), p_cnode[2]->n(), Map::et_constant, true );
+	}
+	if ( !p_cnode[3]->isGround  )
+	{
+		p_A->setUse_b( p_cnode[3]->n(), p_cbranch[0]->n(), Map::et_constant, true );
+		p_A->setUse_c( p_cbranch[0]->n(), p_cnode[3]->n(), Map::et_constant, true );
+	}
+}
+
+
+void VCVS::add_initial_dc()
+{
+	if (!b_status)
+		return;
+	
+	A_c( 0, 0 ) -= m_g;
+	A_c( 0, 1 ) += m_g;
+	A_b( 2, 0 ) = 1;
+	A_c( 0, 2 ) = 1;
+	A_b( 3, 0 ) = -1;
+	A_c( 0, 3 ) = -1;
+}
+
+
+void VCVS::updateCurrents()
+{
+	if (!b_status) return;
+	m_cnodeI[0] = m_cnodeI[1] = 0.;
+	m_cnodeI[3] = p_cbranch[0]->i;
+	m_cnodeI[2] = -m_cnodeI[3];
+}
+
+