bjt.h

/***************************************************************************
 *   Copyright (C) 2003-2005 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.                                   *
 ***************************************************************************/

#ifndef BJT_H
#define BJT_H

#include "nonlinear.h"

class BJTState
{
        public:
                BJTState();
                void reset();

                BJTState operator-( const BJTState & s ) const;

                double A[3][3];
                double I[3];
};

// why isn't this a part of the BJT class? 
class BJTSettings
{
        public:
                BJTSettings();
                
                double I_S; 
                double N_F; 
                double N_R; 
                double B_F; 
                double B_R; 
};

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();
                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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