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/***************************************************************************
* Copyright (C) 2005 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 "opamp.h"
OpAmp::OpAmp()
: Element::Element()
{
m_numCBranches = 1;
m_numCNodes = 3;
}
OpAmp::~OpAmp()
{
}
void OpAmp::add_map()
{
if (!b_status)
return;
if ( !p_cnode[0]->isGround )
{
// Non-inverting input
p_A->setUse_c( p_cbranch[0]->n(), p_cnode[0]->n(), Map::et_constant, true );
}
if ( !p_cnode[2]->isGround )
{
// Inverting input
p_A->setUse_c( p_cbranch[0]->n(), p_cnode[2]->n(), Map::et_constant, true );
}
if ( !p_cnode[1]->isGround )
{
// Output
p_A->setUse_b( p_cnode[1]->n(), p_cbranch[0]->n(), Map::et_constant, true );
}
}
void OpAmp::add_initial_dc()
{
if (!b_status)
return;
// Non-inverting input
A_c( 0, 0 ) = 1;
// Inverting input
A_c( 0, 2 ) = -1;
// Output
A_b( 1, 0 ) = 1;
}
void OpAmp::updateCurrents()
{
if (!b_status) return;
m_cnodeI[0] = m_cnodeI[2] = 0.0;
m_cnodeI[1] = p_cbranch[0]->i;
}
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