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Samenvatting Electricity and ElectronicsELECTRICITY & ELECTRONICS
From electrons to bits
Information and electrical signals
1. How is information communicated electrically?
2. How do you extract information from a signal?
3. How are analog signals communicated digitally?
(voice, music and video)
A signal is a function of time and/or space
,Claude Chappe connected Paris and Lille with his optical telegraph network, in 1792
The Morse code was invented in 1838, replacing optical links with electrical wires
,Guillermo Marconi invented the radio communication, in 1895
x(t) = coded m(t)
r(t) = received x(t) --> kan anders zijn dan x(t), bv. als er een fout in zit
channel = medium
Where is the information in a signal?
ionising= kan structuur van je atomen veranderen
, A=3, C= -1 = "midden', wavelength= 6, f=1/6, phi = pi/2
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