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Diffstat (limited to 'src/electronics/simulation/nonlinear.h')
| -rw-r--r-- | src/electronics/simulation/nonlinear.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/electronics/simulation/nonlinear.h b/src/electronics/simulation/nonlinear.h new file mode 100644 index 0000000..422f3a4 --- /dev/null +++ b/src/electronics/simulation/nonlinear.h @@ -0,0 +1,48 @@ +/*************************************************************************** + * 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 NONLINEAR_H +#define NONLINEAR_H + +#include "element.h" + +/** +@short Represents a non-linear circuit element (such as a diode) +@author David Saxton +*/ +class NonLinear : public Element +{ + public: + NonLinear(); + + virtual bool isNonLinear() { return true; } + /** + * Newton-Raphson iteration: Update equation system. + */ + virtual void update_dc() = 0; + + protected: + double diodeCurrent( double v, double I_S, double Vte ) const; + /** + * Conductance of the diode - the derivative of Schockley's + * approximation. + */ + double diodeConductance( double v, double I_S, double Vte ) const; + /** + * Limits the diode voltage to prevent divergence in the nonlinear + * iterations. + */ + double diodeVoltage( double v, double V_prev, double Vt, double V_crit ) const; + void diodeJunction( double v, double I_S, double Vte, double * I, double * g ) const; + + double diodeCriticalVoltage( double I_S, double Vte ) const; +}; + +#endif |