Single pole filter

1. What is a single pole filter?
2. What is a pole filter?
3. What is single pole IIR filter?
4. What are all pole filters?

What is a single pole filter?

In filter design it is understood that a single RC circuit – a circuit with one capacitor and one resistor – is a one “pole” filter.

What is a pole filter?

The term in filters comes from 'pole' as a term in mathematics, it's a type of singularity where the function goes to infinity. When analyzing how an alaog filter affects the sound, that response surface can have many different numbers of poles, in the mathematical sense.

What is single pole IIR filter?

A single-pole IIR low-pass filter can be defined in discrete time as y += a * (x - y) , where y is the output sample, x is the input sample and a is the decay coefficient. However, the definition of a varies. On Wikipedia, it's defined as 2πfc/(2πfc+1) (where fc is the cutoff frequency).

What are all pole filters?

The Allpole Filter block independently filters each channel of the input signal with the specified allpole filter. The block can implement static filters with fixed coefficients, as well as time-varying filters with coefficients that change over time. You can tune the coefficients of a static filter during simulation.