# Difference between revisions of "Energy in a signal"

From Class Wiki

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===Energy of a Signal=== |
===Energy of a Signal=== |
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From circuit analysis we know that the power generated by a voltage source is, |
From circuit analysis we know that the power generated by a voltage source is, |
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− | : <math>P(t) = { |
+ | : <math>P(t) = {v^2(t) \over R}</math> |

Assuming that R is 1 then the total energy is just, |
Assuming that R is 1 then the total energy is just, |
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− | : <math>W = \int_{-\infty}^\infty | |
+ | : <math>W = \int_{-\infty}^\infty |v|^2(t) \, dt</math> |

## Revision as of 20:05, 10 October 2006

### Definition of Energy

Energy is the ability or potential for something to create change. Scientifically energy is defined as total work done by a force. Work can be mathematically calculated as the line integral of force per infinatesimal unit distance,

Power represents a change in energy.

This means we can also write energy as

### Energy of a Signal

From circuit analysis we know that the power generated by a voltage source is,

Assuming that R is 1 then the total energy is just,

This page is far from complete please feel free to pick up where it has been left off.