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/***************************************************************************
* Copyright (C) 2003-2005 by David Saxton *
* [email protected] *
* *
* 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. *
***************************************************************************/
#ifndef BJT_H
#define BJT_H
#include "matrix.h"
#include "nonlinear.h"
class BJTState
{
public:
BJTState();
void reset();
BJTState operator-( const BJTState & s ) const;
double A[3][3];
double I[3];
};
class BJTSettings
{
public:
BJTSettings();
double I_S; ///< saturation current
double N_F; ///< forward emission coefficient
double N_R; ///< reverse emission coefficient
double B_F; ///< forward beta
double B_R; ///< reverse beta
};
/**
@author David Saxton
*/
class BJT : public NonLinear
{
public:
BJT( bool isNPN );
virtual ~BJT();
virtual Type type() const { return Element_BJT; }
virtual void update_dc();
virtual void add_initial_dc();
virtual void add_map();
BJTSettings settings() const { return m_bjtSettings; }
void setBJTSettings( const BJTSettings & settings );
protected:
virtual void updateCurrents();
/**
* Calculates the new BJTState from the voltages on the nodes.
*/
void calc_eq();
void calcIg( double V_BE, double V_BC, double * I_BE, double * I_BC, double * I_T, double * g_BE, double * g_BC, double * g_IF, double * g_IR );
BJTState m_os;
BJTState m_ns;
int m_pol;
double V_BE_prev, V_BC_prev;
BJTSettings m_bjtSettings;
};
#endif
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