iir_filter_single_pole_s32 Struct Reference

Signed 32-bit IIR single-pole filter with fraction saving. More...

#include <filter.h>

Data Fields
int32_t	y_prev
	Previous filter output.
uint32_t	alpha
	Filter time constant, 0-1 scaled by (1 << 32)
uint32_t	error
	Accumulated fractional error from the previous step.

Detailed Description

Signed 32-bit IIR single-pole filter with fraction saving.

Fraction saving is a noise shaping method that ensures that the output of a DC input eventually equals that input.

Field Documentation

alpha

uint32_t iir_filter_single_pole_s32::alpha

Filter time constant, 0-1 scaled by (1 << 32)

error

uint32_t iir_filter_single_pole_s32::error

Accumulated fractional error from the previous step.

y_prev

int32_t iir_filter_single_pole_s32::y_prev

Previous filter output.

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The documentation for this struct was generated from the following file:

• infuse/math/filter.h