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/***************************************************************************
* 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
*/
class Diode : public NonLinear
{
public:
Diode();
virtual ~Diode();
virtual void update_dc();
virtual void add_initial_dc();
virtual void add_map();
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
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