Digital noise filtering

after anti aliasing analog filter and ADC conversion we do end up with a digitized signal.

At a starting point internal representation will often be 16 or 32 bit signed or unsigned integers.

Many if not most controllers has n input range of (0..Vmax) so if you have a plus/minus signal you must at analog side maybe add a DC offset value to the signal. This is for the time being out of scope on this page.
See in bottom of this page for a very simple inspiration

These pages is NOT an intro to the advanced engineering math behind but should be viewed as a more easy way to get started on low poss filtrering on your digitized signals.

We go a little into detail with

• Simple Moving Average

• Expotential Movinge Average

Both methodologies are simple to implement but may have more math details than observed by first glanse.

More links

• https://www.analog.com/media/en/technical-documentation/dsp-book/dsp_book_ch15.pdf

  • local copy

• AverageFiltering.pdf

Electronics

Many if not most controllers has n input range of 0..VmaxV so if you have a plus/minus signal you must at analog side maybe add a DC offset value to the signal. This is for the time being out of scope on this page.
See in bottom of this page for a very simple inspiration

Be inspired here - here is a local copy

THE BEER-WARE LICENSE (Revision v 42) jensd@jensd.dk wrote this file.
As long as you retain this notice you can do whatever you want with this stuff on these pages.
If we meet some day, and you think this stuff is worth it, you can buy me a beer in return :-)
(C) Jens Dalsgaard Nielsen
credit for license this goes to phk@FreeBSD.ORG