(New page: Property: Causal System Definition: The system is causal such that it gives a zero output for the time variable t < 0. Example that satisfies this property: h(t)=u(t-1)*e^(-t) For t<0...) |
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Latest revision as of 19:45, 1 July 2009
Property: Causal System
Definition: The system is causal such that it gives a zero output for the time variable t < 0.
Example that satisfies this property:
h(t)=u(t-1)*e^(-t)
For t<0, h(t)=0*e^(-t)=0; so this system is causal.
Example that doesn't satisfy this property:
h(t)=u(1-t)*e^(-t)
For t<0, h(t)=1*e^(-t)=e^(-t) not equal to zero; so this system is not causal.
