libsidplayfp  1.0.3
OpAmp.h
00001 /*
00002  * This file is part of libsidplayfp, a SID player engine.
00003  *
00004  * Copyright 2011-2013 Leandro Nini <drfiemost@users.sourceforge.net>
00005  * Copyright 2007-2010 Antti Lankila
00006  *
00007  * This program is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 2 of the License, or
00010  * (at your option) any later version.
00011  *
00012  * This program is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
00020  */
00021 
00022 #ifndef OPAMP_H
00023 #define OPAMP_H
00024 
00025 #include "Spline.h"
00026 
00027 namespace reSIDfp
00028 {
00029 
00038 class OpAmp
00039 {
00040 private:
00041     static const double EPSILON;
00042 
00044     double x;
00045 
00046     const double Vddt, vmin, vmax;
00047 
00048     Spline* opamp;
00049 
00050     double out[2];
00051 
00052 public:
00060     OpAmp(const double opamp[][2], int opamplength, double Vddt) :
00061         x(0.),
00062         Vddt(Vddt),
00063         vmin(opamp[0][0]),
00064         vmax(opamp[opamplength - 1][0]),
00065         opamp(new Spline(opamp, opamplength)) {}
00066 
00067     ~OpAmp() { delete opamp; }
00068 
00069     void reset()
00070     {
00071         x = vmin;
00072     }
00073 
00081     double solve(double n, double vi);
00082 };
00083 
00084 } // namespace reSIDfp
00085 
00086 #endif