Chris Stoughton - posted 08:49, Tuesday 04 June 2024 - last comment - 13:31, Thursday 06 June 2024(11623)
Simulating fixed point bi quad filters
The notebook DirectFrom2FxpDemo.ipynb simulates a digital biquad filter with fixed point math. For 16-bit inputs and outputs, 16-bit coefficients, and 32 bit accumalation terms, there is a 4 dB additional noise added.
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4 dB seems like a lot for this kind of thing. Do you have a copy of the notebook?