Single pole digital filter

1. What is a single pole filter?
2. What are the two types of digital filters?
3. What does a DSP filter do?
4. What is single pole IIR filter?

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 are the two types of digital filters?

There are two fundamental types of digital filters: finite impulse response (FIR) and infinite impulse response (IIR).

What does a DSP filter do?

Digital filters are a very important part of DSP. In fact, their extraordinary performance is one of the key reasons that DSP has become so popular. As mentioned in the introduction, filters have two uses: signal separation and signal restoration.

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).