Overview
Threshold with hysteresis
Discussion
The hysteresis module implements switching above and below a threshold. The module accepts floating-point inputs and outputs 0 when the signal level is below the threshold and 1 when above. Instead of just a single threshold the module incorporates hysteresis by having separate upper and lower thresholds. The output switches from 0->1 when the input signal rises above the upperThreshold and then stays at 1 until the signal drops below the lowerThreshold. The module is thus above to avoid frequent switching when signal levels are close to the threshold.
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This version of the module works with fract32 data.
Type Definition
| Code Block |
|---|
typedef struct _ModuleHysteresisFract32
{
ModuleInstanceDescriptor instance; // Common Audio Weaver module instance structure
fract32 upperThreshold; // Upper switching threshold
fract32 lowerThreshold; // Lower switching threshold
INT32* state; // Current state per chanel
} ModuleHysteresisFract32Class; |
Variables
Properties
Name | Type | Usage | isHidden | Default value | Range | Units |
upperThreshold | fract32 | parameter | 0 | 0.1 | Unrestricted | |
lowerThreshold | fract32 | parameter | 0 | -0.1 | Unrestricted | |
state | int* | state | 0 | [1 x 1] | Unrestricted |
Pins
Input Pins
Name: in
Description: Input signal
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Sample rate range: Unrestricted
Complex support: Real
Output Pins
Name: out
Description: Output signal
Data type: int
MATLAB Usage
File Name: hysteresis_fract32_module.m
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