#include <GETFilterLow2.hh>

Inheritance diagram for GETFilterLow2:

Public Member Functions
Constructors, affectation, destructor
	GETFilterLow2 (u_int n=0, double dt=0.01L, double fcut=0.L, double q=0.7071067811865475244008443621048490L)

	GETFilterLow2 (const GETFilterLow2 &proc)

virtual	~GETFilterLow2 ()

Initialization functions
virtual void	SetQualityFactor (double q)

double	GetQualityFactor () const

virtual void	UpdateFilter ()

ROOT related functions
	ClassDef (GETFilterLow2, 0)

Public Member Functions inherited from GETFilterCut
	GETFilterCut (GETObject &obj, double fcut=0.)

	GETFilterCut (u_int n=0, double dt=0.01, double fcut=0.)

	GETFilterCut (const GETFilterCut &proc)

virtual	~GETFilterCut ()

virtual void	SetCutFrequency (double fcut)

double	GetCutFrequency () const

virtual void	Init (u_int n, double dt)

	ClassDef (GETFilterCut, 0)

Public Member Functions inherited from GETFilter
	GETFilter (GETObject &obj)

	GETFilter (u_int n=0, double dt=0.01)

	GETFilter (const GETFilter &proc)

	GETFilter (GETFilter &f1, GETFilter &f2)

virtual	~GETFilter ()

virtual void	Reset ()

virtual void	SetNormalized (bool b=true)

virtual void	Normalize (double norm=1.)

virtual void	Scale (double fact=1.)

const GETSample *	GetFilterPtr () const

GETSample *	GetFilterPtr ()

const GETSample &	GetFilter () const

GETSample &	GetFilter ()

virtual GETSample *	ProcessSample (GETChannel &channel, u_short info=GET::signalOut)

virtual GETSample *	ProcessSample (GETSample &sample, GETSample &result, GETChannel &channel)

	ClassDef (GETFilter, 0)

Public Member Functions inherited from GETProcess
	GETProcess (GETObject &obj)

	GETProcess (u_int n=0, double dt=0.01)

	GETProcess (const GETProcess &proc)

virtual	~GETProcess ()

virtual void	SetOptions (u_int opts)

virtual void	SetOption (u_int flags, bool b=true)

virtual u_int	GetOptions ()

virtual bool	GetOption (u_int flags)

u_int	GetDimension () const

double	GetSamplingTime () const

GETSample *	GetResultSamplePtr ()

const GETSample *	GetResultSamplePtr () const

GETSample &	GetResultSample ()

const GETSample &	GetResultSample () const

	ClassDef (GETProcess, 0)

Protected Attributes
double	quality_factor
	Quality factor of the filter.

Protected Attributes inherited from GETFilterCut
double	cut_frequency
	Filter cut frequency.

Protected Attributes inherited from GETFilter
GETSample	filter_fct
	Filter function for an AGET channel.

Protected Attributes inherited from GETProcess
u_int	options
	Option flags.

GETSample	result_sample
	Internal processing result sample (processing result)

Private Member Functions
	GObject (GETFilterLow2)

Detailed Description

This class defines a low pass filter of order 2, with a response in Fourier space with following form:

$F(f) = \frac{1}{1 - \left( \frac{f}{f_{0}} \right)^{2} + j \frac{1}{Q} \frac{f}{f_{0}}}$

where $f_{0}$ is the cut frequency and $ Q $ is the quality factor:

if , the filter corresponds to the successive application of two first order filters;
if $Q > 0.5 \sqrt{2}$ the filter has a pseudo-resonance.

Constructor & Destructor Documentation

GETFilterLow2::GETFilterLow2	(	u_int	n = `0`,
		double	dt = `0.01L`,
		double	fcut = `0.L`,
		double	q = `0.7071067811865475244008443621048490L`
	)

Constructor.

Parameters

n	sampling size of the channels
dt	sampling period (us)
fcut	cut frequency
q	quality factor

References GETFilterCut::cut_frequency, GETFilter::Init(), quality_factor, and UpdateFilter().

GETFilterLow2::GETFilterLow2 ( const GETFilterLow2 & proc )

Copy constructor.

Parameters

proc	object to copy

References GETFilterCut::cut_frequency, GETFilterCut::GetCutFrequency(), GETFilter::GetFilter(), GetQualityFactor(), GETFilter::Init(), quality_factor, and UpdateFilter().

GETFilterLow2::~GETFilterLow2 ( )

virtual

Destructor.

Member Function Documentation

GETFilterLow2::ClassDef	(	GETFilterLow2	,
		0
	)

for use within ROOT.

double GETFilterLow2::GetQualityFactor ( ) const

inline

Return the quality factor.

References quality_factor.

Referenced by GETFilterLow2(), and GETFilterLowN::GETFilterLowN().

GETFilterLow2::GObject ( GETFilterLow2 )

private

Macro from GCpp library that defines the following functions:

ClassName(): return the real class name of the object
StaticClassName(): return the used class name of the object (that may be a base class of the real object).
IsInstanceOf<T>(): return true if the current object is an instance of the template class name argument
Clone(): return an allocated copy of the object.