signals

Thread Starter

raks_universe

Joined Mar 15, 2009
67
i am new to this electronic signal topic
please give
1.introduction to electronic signal in easiest way
2. necessity of electronic signals
3.HISTORY of electronic signal
 

Wendy

Joined Mar 24, 2008
23,408
First, define electronic singal, there are many types, such as RF (then we get into modulation, where there are lots of variations), optical, electrical, audible, etc. Ever hear of smoke signals?

Generally a signal is a change of state in something, which sends inforation to somewhere else. It can also be a steady state (no change), since this too is a form of information.

An electronic signal (electrical) is still a change of state. The exact method is a protocol, and that is truely vast.

As I'm writing this, it occurs to me,

This sounds a lot like a homework assignment.
 
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