Digital Filters

1. What are types of digital filter?
2. What are digital filters used for?
3. What are 3 advantages of digital filters?
4. What are the 4 categories of digital filtering?

What are types of digital filter?

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

What are digital filters used for?

Digital filters are used for two general purposes: (1) separation of signals that have been combined, and (2) restoration of signals that have been distorted in some way. Analog (electronic) filters can be used for these same tasks; however, digital filters can achieve far superior results.

What are 3 advantages of digital filters?

Digital filters require only the arithmetic operations of addition, subtraction, and multiplication. Digital filters do not drift with temperature or humidity or require precision components. Digital filters have a superior performance-to-cost ratio. Digital filters do not suffer from manufacturing variations or aging.

What are the 4 categories of digital filtering?

There are two categories of digital filter: the recursive filter and the nonrecursive filter. These are often referred to as infinite impulse response (IIR) filters and finite impulse response (FIR) filters, respectively.