TOPIC: Difference between 2nd order and Butterworth

Hi,

I have a quastion about difference between 1st order 2nd order filters and other filters like Butterworth, Linkwitz-Riley, Chebyshev, Bessel.
What does mean 1st or 2nd order filter in digital domain? I know that order is connected with slope but a don't have idea what are differences. I methinks that 1st and 2nd order filters are equivalent analog RC filters, but I'm not sure.
Can You give any idea where can I read about it.

Best regards
Michał Kmiecik

Yes it’s same principle as rc or analog filters

After the pass band the attenuation of the filter grows proportionally to the number of poles...

The digital filter is a digital representation of the analog filter.

I’m pretty sure it’s the maximum number of delay elements in the design IIRC

Instead of caps and coils it’s coefficients and biquads ,
Hope that helps