(Examples)
(Examples)
Line 14: Line 14:
  
 
Linear:
 
Linear:
 
<math>\ S_{1} = 2x(t + 3) + x(t - 8)</math>
 
 
<math>\ S_{2} = x(t - t_{0})</math>
 
 
<math>\ S_{1} \rightarrow S_{2} = 2x(t - t_{0} + 3) + x(t - t_{0} - 8)</math>
 
 
<math>\ S_{2} \rightarrow S_{1} = 2x(t - t_{0} + 3) + x(t - t_{0} - 8)</math>
 
 
 
Since the results are the same the system is time invariable.
 
 
  
 
Non-Linear:
 
Non-Linear:
 
<math>\ S_{1} = x(-t + 3) - x(-t - 8)</math>
 
 
<math>\ S_{2} = x(t - t_{0})</math>
 
 
<math>\ S_{1} \rightarrow S_{2} = x(-t + t_{0} + 3) - x(-t + t_{0} - 8)</math>
 
 
<math>\ S_{2} \rightarrow S_{1} = x(-t - t_{0} + 3) - x(-t - t_{0} - 8)</math>
 
 
 
Since the results are different they system is time variant.
 

Revision as of 17:49, 11 September 2008

Definition

If Z(t) and W(t) in the following are equal the system is linear.


Linearity Part 1 ECE301Fall2008mboutin.jpg



Linearity Part 2 ECE301Fall2008mboutin.jpg

Examples

Linear:

Non-Linear:

Alumni Liaison

Correspondence Chess Grandmaster and Purdue Alumni

Prof. Dan Fleetwood