diff options
Diffstat (limited to 'src/electronics/simulation/bjt.h')
-rw-r--r-- | src/electronics/simulation/bjt.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/electronics/simulation/bjt.h b/src/electronics/simulation/bjt.h new file mode 100644 index 0000000..52022aa --- /dev/null +++ b/src/electronics/simulation/bjt.h @@ -0,0 +1,75 @@ +/*************************************************************************** + * 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 "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 |