Logo Search packages:      
Sourcecode: ktechlab version File versions

diode.h

/***************************************************************************
 *   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.                                   *
 ***************************************************************************/

#ifndef DIODE_H
#define DIODE_H

#include "nonlinear.h"

class DiodeSettings
{
      public:
            DiodeSettings();
            void reset();
            
            double I_S; ///< Diode saturation current
            double N;   ///< Emission coefficient
            double V_B; ///< Reverse breakdown
//          double R;   ///< Series resistance
};


/**
This simulates a diode. The simulated diode characteristics are:

@li I_s: Diode saturation current
@li V_T: Thermal voltage = kT/4 = 25mV at 20 C
@li n: Emission coefficient, typically between 1 and 2
@li V_RB: Reverse breakdown (large negative voltage)
@li G_RB: Reverse breakdown conductance
@li R_D: Base resistance of diode

@short Simulates the electrical property of diode-ness
@author David Saxton
*/
00042 class Diode : public NonLinear
{
      public:
            Diode();
            virtual ~Diode();
      
            virtual void update_dc();
            virtual void add_initial_dc();
            virtual void add_map();
00051             virtual Element::Type type() const { return Element_Diode; }
            DiodeSettings settings() const { return m_diodeSettings; }
            void setDiodeSettings( const DiodeSettings & settings );
            /**
             * Returns the current flowing through the diode
             */
            double current() const;
      
      protected:
            virtual void updateCurrents();
            void calc_eq();
            
            void calcIg( double V, double * I, double * g ) const;
            
            double g_new, g_old;
            double I_new, I_old;
            double V_prev;
      
            DiodeSettings m_diodeSettings;
};

#endif


Generated by  Doxygen 1.6.0   Back to index