Analogue Signal <=> Power Signal

[devonsc]

Hi there,

Would like to find out more regarding both Analogue Signal as well as Power Signal.

Can anyone explain the difference between these two terms? And if it is not too much trouble, do you mind giving simple examples as well?

Thanks in advance...

 

[Russlk]

The world is divided into two systems: analog and digital. An analog signal is continuous, it does not go off and on like a digital signal.
A power signal is probably DC and is not properly called a signal because it does not vary and therefore carries no information. On the other hand, a power signal could be a digital signal that turns the power on or off. Actually, it means whatever you want it to mean.

 

[devonsc]

Thanks a lot for your concern on my simple question...[/quote]

 

[Sebi]

I mean, the power signal also can be analog, e.g. the power audio amplifier output...

 

[Styx]

or power could be a digital "healthy power" signal.

question is too vague to really answer it...

 

[checkmate]

The question is not vague. There is an official definition of power signal in electronics. Most who have studied signals will come across it, but it is often forgotten as an unimportant definition.

It's a signal with non-zero but finite average signal power. It is often contrasted with energy signals, which are signals with finite signal energy.

Power signals have non-zero average power and zero energy.
Energy signals have non-zero energy and zero average power.

For example, a sinusoidal signal is a power signal, while a signal pulse is an energy signal.