[sdiy] FPGA Madness? (Was: NCO Jitter)

Neil Johnson neil.johnson71 at gmail.com
Sun Aug 5 23:08:39 CEST 2018


Richie Burnett wrote:
> Also you might want to look at CIC filters for decimation as I am told that they are good for large decimation ratios and are relatively easy to implement in hardware on an FPGA.

For high ratios definitely look into CIC filters.  The Hogenauer
implementation is particularly efficient in hardware, and I have done
a software version that runs pretty fast on an ARM.
This was for converting PDM mic data into PCM on a low-cost 32-bit ARM
MCU for a commercial application.


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