Hysteresis band filter

float uz_signals_hysteresisband_filter(float input, float upper_limit, float lower_limit)

Passes the input signal through if it is inside the hysteresis band limited by the upper or lower limit, otherwise the output is zero.

Parameters:

• input – Any input signal

• upper_limit – Upper limit of the hysteresis band

• lower_limit – Lower limit of the hysteresis band (needs to be smaller than the upper limit)

Returns:

float filtered signal

Example

Listing 64 Example function call to filter the input

#include "uz_signals.h"
int main(void) {
   float input = 2.0f;
   float upper_limit = 0.5f;
   float lower_limit = 0.2f;
   float output = uz_signals_hysteresisband_filter(input, upper_limit, lower_limit);
}

Description

Passes the input through if it is inside a hysteresis band limited by the upper and lower limit values. Otherwise the output is 0.

Fig. 265 hysteresis band filter