| # DSP Filters - a selection of digital filters from @ZipCPU |
| |
| Source: https://github.com/ZipCPU/dspfilters/tree/49b9a0235f88c34b9a997b1aa9a634ad130ea719 |
| |
| Currently three designs exist: |
| |
| - **fastfir_fixedtaps** A 1-output per clock finite impulse response (FIR) filter, |
| configured as a 12-bit 128-tap band-pass filter. |
| |
| - **slowfil_fixedtaps** A 1-output per number-of-taps clocks finite impulse response |
| (FIR) filter, configured as a 12-bit 128-tap band-pass filter. This original variant |
| uses a ring-buffer to store all input samples. |
| |
| - **slowfil_srl_fixedtaps** A 1-output per number-of-taps clocks finite impulse |
| response (FIR) filter, configured as a 12-bit 128-tap band-pass filter. This is a |
| modified variant of the original slowfil that uses a shift-register approach to |
| store all input samples. |
| |
| The 12-bit 128-tap band pass filter has the following performance characteristics: |
| - 0-200Hz: -119.27dB |
| - 300-500Hz: 0.00dB |
| - 600-1000Hz: -119.27dB |
| coefficients generated using http://t-filter.engineerjs.com |
