Re: Estimating Attenuation for Low Pass Filter in ADC->DAC System (am i doing it righ
Kral--
Thanks a bunch for your reply. The steps/ranges on the DAC and ADC are indeed equal, so it's good to hear I've at least got the overall logic correct.
If I might trouble you for one more push in the right direction, I think you may have pointed up a flaw in my understanding of decibels in this context. I had it in my head that the 20*log definition was for use with comparison of quantities squared, since:
10*log(a/b) = 20*log(a^2/b^2)
I assumed that since I was considering amplitudes (full range at ADC, half-step at DAC), I should use 10*log. So I guess my general question is, what rule of thumb should I be applying to select this as a case where I'm concerned with powers (or squared quantities) as opposed to amplitudes. I know that's 101 level, but I've obviously not learned it correctly.
In any case, I do appreciate your taking time for a new guy. Be well, and have a great day.
--Brad