After doing some research I found a handful of ways to generate white noise:
1) amplifying high value resistor noise
2) ampligying zener noise
3) using LFSRs
4) using a micro with a DAC and program a long PRBS loop
I'm currently most interested in #3, but curious where the tipping point is for LFSR length vs clock speed for a repeating pattern to be audibly (un)noticeable? And whether it may actually be more practical to use a micro (as the BOM count starts increasing)?
Anyone have experience playing with this?
I found two interesting articles:
https://www.jmargolin.com/patents/atari3.pdf
https://www.digikey.com/en/articles/techzone/2018/mar/use-readily-available-components-generate-binary-sequences-white-noise
1) amplifying high value resistor noise
2) ampligying zener noise
3) using LFSRs
4) using a micro with a DAC and program a long PRBS loop
I'm currently most interested in #3, but curious where the tipping point is for LFSR length vs clock speed for a repeating pattern to be audibly (un)noticeable? And whether it may actually be more practical to use a micro (as the BOM count starts increasing)?
Anyone have experience playing with this?
I found two interesting articles:
https://www.jmargolin.com/patents/atari3.pdf
https://www.digikey.com/en/articles/techzone/2018/mar/use-readily-available-components-generate-binary-sequences-white-noise