mirror of
https://github.com/ra3xdh/qucs_s
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76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
/***************************************************************************
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copyright: (C) 2010 by Michael Margraf
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef FILTER_H
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#define FILTER_H
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#define CLASS_LOWPASS 0
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#define CLASS_HIGHPASS 1
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#define CLASS_BANDPASS 2
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#define CLASS_BANDSTOP 3
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#define TYPE_BESSEL 0
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#define TYPE_BUTTERWORTH 1
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#define TYPE_CHEBYSHEV 2
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#define TYPE_CAUER 3
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#define LIGHTSPEED 299792458.0
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#define Z_FIELD 376.73031346958504364963
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#include <math.h>
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#define atanh(x) (0.5 * log((1.0 + (x)) / (1.0 - (x))))
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#define asinh(x) log((x) + sqrt((x) * (x) + 1.0))
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#define acosh(x) log((x) + sqrt((x) * (x) - 1.0))
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#define coth(x) (1.0 + 2.0 / (exp(2.0*(x)) - 1.0))
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#define sech(x) (2.0 / (exp(x) + exp(-(x))))
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struct tFilter {
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int Type;
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int Class;
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int Order;
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double Ripple; // in dB
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double Impedance;
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double Frequency;
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double Frequency2;
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double Frequency3;
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double Attenuation;
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};
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class QString;
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class Filter {
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public:
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Filter();
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static double getNormValue(int, tFilter*);
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static double getQuadraticNormValues(int, tFilter*, double&);
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protected:
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static QString num2str(double);
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static double getE6value(double);
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private:
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static double BesselValue(int, int);
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static double ButterworthValue(int, int);
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static double ChebyshevValue(int, int, double);
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static double quadraticBesselValues(int, int, double&);
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static double quadraticButterworthValues(int, int, double&);
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static double quadraticChebyshevValues(int, int, double, double&);
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};
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#endif
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