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== Periodic Function == | == Periodic Function == | ||
| − | An example of a CT periodic function is <math>y=cos( | + | An example of a CT periodic function is <math>y=cos(t)</math>. The graph shows that the equation is periodic because |
| + | |||
| + | <math>cos(t) = cos(t + T)</math> | ||
[[Image:Periodic_ECE301Fall2008mboutin.JPG]] | [[Image:Periodic_ECE301Fall2008mboutin.JPG]] | ||
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== Non-Periodic Function == | == Non-Periodic Function == | ||
| − | An example of a DT non-periodic function is <math>y=cos( | + | An example of a DT non-periodic function is <math>y=cos(n)</math>. The graph shows that the equation is non-periodic because |
| + | |||
| + | there is no integer value for N which makes <math>cos(n) = cos(n + N)</math> true. | ||
[[Image:Non-periodic_ECE301Fall2008mboutin.JPG]] | [[Image:Non-periodic_ECE301Fall2008mboutin.JPG]] | ||
Revision as of 13:06, 4 September 2008
Periodic Function
An example of a CT periodic function is $ y=cos(t) $. The graph shows that the equation is periodic because
$ cos(t) = cos(t + T) $
Non-Periodic Function
An example of a DT non-periodic function is $ y=cos(n) $. The graph shows that the equation is non-periodic because
there is no integer value for N which makes $ cos(n) = cos(n + N) $ true.
Sources
Lecture Notes
