Block: AdaptivePT1


Inports

In	Input In(k)

fc	Cutoff frequency


Outports

Out	Output Out(k)


Mask Parameters

V	Gain

fmax	Maximum frequency [Hz]

ts_fact	Multiplication factor of base sampling time (in integer format)

method	Discretization method

Description:

First order low pass with adaptive cut off frequency:

G(s) = V/(s/(2*pi*fc) + 1)

Transfer function (zero-order hold discretization method):

-2πf T G (z ) = V 1---e----c-s z - e-2πfcTs

Implementations:

FiP8	8 Bit Fixed Point Implementation
FiP16	16 Bit Fixed Point Implementation
FiP32	32 Bit Fixed Point Implementation

Implementation: FiP8

Name	FiP8
ID	3408
Revision	0.1
C filename	AdaptivePT1_FiP8.c
H filename	AdaptivePT1_FiP8.h

8 Bit Fixed Point Implementation


Controller Parameters

w_scale	Calculation base for wc: -2piTs*fmax

gain	Gain

sfr	Shift factor for gain

in_old	In(k-1)

Data Structure:

typedef struct {
     uint16        ID;
     int8          *In;
     int8          *fc;
     int8          Out;
     int8          w_scale;
     int8          gain;
     uint8         sfr;
     int8          in_old;
} ADAPTIVEPT1_FIP8;

Implementation: FiP16

Name	FiP16
ID	3409
Revision	1
C filename	AdaptivePT1_FiP16.c
H filename	AdaptivePT1_FiP16.h

16 Bit Fixed Point Implementation


Controller Parameters

w_scale	Calculation base for wc: -2piTs*fmax

gain	Gain

sfr	Shift factor for gain

in_old	In(k-1)

Data Structure:

typedef struct {
     uint16        ID;
     int16         *In;
     int16         *fc;
     int16         Out;
     int16         w_scale;
     int16         gain;
     uint8         sfr;
     int16         in_old;
} ADAPTIVEPT1_FIP16;

Implementation: FiP32

Name	FiP32
ID	3410
Revision	0.1
C filename	AdaptivePT1_FiP32.c
H filename	AdaptivePT1_FiP32.h

32 Bit Fixed Point Implementation


Controller Parameters

w_scale	Calculation base for wc: -2piTs*fmax

gain	Gain

sfr	Shift factor forgain

in_old	In(k-1)

Data Structure:

typedef struct {
     uint16        ID;
     int32         *In;
     int32         *fc;
     int32         Out;
     int32         w_scale;
     int32         gain;
     uint8         sfr;
     int32         in_old;
} ADAPTIVEPT1_FIP32;