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/*
wdf.h
Copyright (C) 2013 Damien Zammit
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.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __WDF_H__
#define __WDF_H__
#include <math.h>
#define BIG 1e12
#define SMALL 1e-14
#define EPSILON 1e-9
#define ITER 50
#define SWAP_PP(x,y) {T tmp=y; y=x; x=tmp;}
#define SWAP_PN(x,y) {T tmp=y; y=-x; x=tmp;}
#define SWAP_NP(x,y) {T tmp=y; y=x; x=-tmp;}
#define SWAP_NN(x,y) {T tmp=y; y=-x; x=-tmp;}
#define TOLERANCE 1e-6
#define MAX(x, y) (( (x) > (y) ) ? x : y )
#define MIN(x, y) (( (x) < (y) ) ? x : y )
typedef double T;
static inline float
sanitize_denormal(float v) {
if(!std::isnormal(v) || !std::isfinite(v))
return 0.f;
return v;
}
class Triode {
public:
T Kb, Gb, Pb;
T Kr, Gr, Pr;
T vg, vk, vp;
T g, mu, gamma, c, gg, e, cg, ig0;
T g1, mu1, gamma1, c1, gg1, e1, cg1, ig01;
T g2, mu2, gamma2, c2, gg2, e2, cg2, ig02;
T ffg(T VG);
T fgdash(T VG);
T ffp(T VP);
T ffp_insane(T VP);
T fpdash(T VP);
T ffk();
T secantfg(T *i1, T *i2);
T newtonfg(T *i1);
T secantfp(T *i1, T *i2);
T newtonfp(T *i1);
bool insane;
Triode();
void compute(T Kbb, T Gbb, T Pbb);
T getC(void);
T getG(void);
T getP(void);
//Brent's method
T r8_abs ( T x );
T r8_epsilon;
T r8_max ( T x, T y );
T r8_sign ( T x );
T zeroffp ( T a, T b, T t );
T zeroffp_insane ( T a, T b, T t );
T zeroffg ( T a, T b, T t );
};
#endif
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