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This version (10 Feb 2021 13:01) was approved by Sanjeeva Reddy.
This version (10 Feb 2021 13:01) was approved by Sanjeeva Reddy.This is an old revision of the document!
Table of Contents
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Nth Order Filter
Description
The Nth Order Filter is a combination of bi-quad filters to form Nth order filter.The Filter has 3 selectable filter types to perform LowPass/HighPass filtering.
The available filter types are:
- Butterworth Low-Pass / High-Pass
- Chebyshev 1 Low-Pass / High-Pass
- Chebyshev 2 Low-Pass / High-Pass
Usage
Targets Supported
| Name | ADSP-214xx(Sample) | ADSP-214xx(Block) | ADSP-215xx/ADSP-SC5xx(Sample) | ADSP-215xx/ADSP-SC5xx(Block) |
|---|---|---|---|---|
| Nth Order Filter | No | No | No | Yes |
Pins
Input
| Input0 | Audio | Input Channel 0 |
Output
| Output0 | Audio | Output channel 0 |
Configurable Parameters
| GUI Parameter Name | Default Value | Range | Function Description |
|---|---|---|---|
| Frequency | 1000 | 3 to 30 KHz | Cut-off frequency |
| Gain | 0 dB | -10 to +10 dB | Filter Gain |
| Q | 1.41 | 1 to 15 | Q factor of the filter |
| Order | 6 | 2 to 20 | Order of the filter |
| Ripple | 1 | 0.1 to 20 | Ripple factor of the filter |
| FilterType | Butterworth | Available filters | Used to select the filter type |
| EnabledOrBypassed | True | True/False | Enabled/Disabled the algorithm |
| Phase | False | True/False | Controls the phase of coefficients in 0 degree or 180 degree phase |
| IsLowPass | True | True/False | Controls the Lowpass or HighPass filter |
| NumChannels | 1 | 1 to 6 | Number of input and output channels. Change in this value requires re-compilation |
DSP Parameters
| Parameter Name | Description | ADSP-214xx/SC5xx/215xx |
|---|---|---|
| Stages | number of bi-quads cascaded | Float |
| A1_Stage0 | Filter coefficient A1 of bi-quad stage 0 | Float |
| A2_Stage0 | Filter coefficient A2 of bi-quad stage 0 | Float |
| B0_Stage0 | Filter coefficient B0 of bi-quad stage 0 | Float |
| B1_Stage0 | Filter coefficient B1 of bi-quad stage 0 | Float |
| B2_Stage0 | Filter coefficient B2 of bi-quad stage 0 | Float |
/srv/wiki.analog.com/data/pages/resources/tools-software/sigmastudiov2/modules/filters/nthorderfilter.txt · Last modified: 13 May 2021 14:08 by Sreesha Y M