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78 lines
1.6 KiB
78 lines
1.6 KiB
/***************************************************************************
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* Copyright (C) 2005 by David Saxton *
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* david@bluehaze.org *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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***************************************************************************/
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#include "elementset.h"
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#include "matrix.h"
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#include "opamp.h"
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OpAmp::OpAmp()
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: Element::Element()
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{
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m_numCBranches = 1;
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m_numCNodes = 3;
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}
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OpAmp::~OpAmp()
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{
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}
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void OpAmp::add_map()
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{
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if (!b_status)
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return;
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if ( !p_cnode[0]->isGround )
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{
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// Non-inverting input
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p_A->setUse_c( p_cbranch[0]->n(), p_cnode[0]->n(), Map::et_constant, true );
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}
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if ( !p_cnode[2]->isGround )
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{
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// Inverting input
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p_A->setUse_c( p_cbranch[0]->n(), p_cnode[2]->n(), Map::et_constant, true );
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}
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if ( !p_cnode[1]->isGround )
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{
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// Output
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p_A->setUse_b( p_cnode[1]->n(), p_cbranch[0]->n(), Map::et_constant, true );
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}
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}
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void OpAmp::add_initial_dc()
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{
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if (!b_status)
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return;
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// Non-inverting input
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A_c( 0, 0 ) = 1;
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// Inverting input
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A_c( 0, 2 ) = -1;
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// Output
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A_b( 1, 0 ) = 1;
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}
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void OpAmp::updateCurrents()
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{
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if (!b_status) return;
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m_cnodeI[0] = m_cnodeI[2] = 0.0;
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m_cnodeI[1] = p_cbranch[0]->i;
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}
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