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Honored Contributor
Honored ContributorFIR II bit growth
Good afternoon, Can I please ask if there is any formula connecting the FIR II filter's performance and bit widths (especially coefficient width). To be more precise I would like to short ...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- Kaz, Thank you very much for your reply, It is very helpful explaining how the conversion works but unfortunately is not what I am after. I would like to know if there is any formula (mathematical relation) between output performance and bit growth. Best Regards George --- Quote End --- I never heard of any formula for that. But my previous post tests that directly. In practice we have to truncate signals to same width as input (usually). You choose your final ADC or DAC bitwidth and study accordingly. There are formulas for SNR of quantisation noise at ADC/DAC which basically states that SNR = 6*bitwidth in dBs for a clean tone.
