Reverse engineering a digital filter

1. What are the two types of digital filters?
2. What is meant by digital filtering?
3. How digital filters are designed?
4. Is low pass filter analog or digital?

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 is meant by digital filtering?

In signal processing, a digital filter is a system that performs mathematical operations on a sampled, discrete-time signal to reduce or enhance certain aspects of that signal. Digital filters can often be made very high order, and are often finite impulse response filters which allows for linear phase response.

How digital filters are designed?

Design of digital filters, involve the use of both frequency domain and time domain techniques. This is because, the filter specifications are often specified in frequency domain and the implementation is done in time-domain in the form of difference equations.

Is low pass filter analog or digital?

Low-Pass Filters from Analog Devices are specifically designed to reject higher frequency noise and unwanted signals while allowing desired signals to pass through.