Systems: LTI systems and LCCD Equations

Question 1

Equation used to describe a DT LTI system.

Answer 1

A difference equation.

Question 2

Equation used to describe a CT LTI system

Answer 2

A differential equation

Question 3

A difference equation.

Answer 3

Equation used to describe a DT LTI system.

Question 4

A differential equation

Answer 4

Equation used to describe a CT LTI system

Question 5

What are the two classes of digital fiters?

Answer 5

FIR - Finite Impulse Response

IIR - Infinite Impulse Response

Question 6

What is the general equation for a difference equation?

Answer 6

Question 7

How can we distinguish a FIR filter?

Answer 7

There is no dependence on previous outputs.

In this case, the a_k value will be equal to zero.

Question 8

How can we distinguish a IIR filter?

Answer 8

There will be some dependence on previous outputs. The a_k value part of the general difference equation will be non-zero.

Question 9

Describe the output of a IIR filter.

Answer 9

A IIR filter will produce unlimited (infinite) response to a single input.

Question 10

Describe the output of a FIR filter.

Answer 10

There will be a finite number of outputs for a single impulse.