Summary Resume - Electricity, Electronics And Photonics 12 pages (18/20)
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Course
Electricity, Electronics And Photonics
Institution
Vrije Universiteit Brussel (VUB)
Summary that can be included in the EEP exam; 12 pages containing all the necessary theory and exercises with example exercises; possible to have exam questions from passing years:)
, 12 13
Working of capacitors Diodes 14
Voltage push electron to one side of capacitor untill capacitor has same voltage Semi-conductive material: allows current flow only in one
as battery. (Energy is stored) even when battery disconnected energy stays direction. Made of p-type and n-type region.
stored. (Because of positive other side) N-type will have extra free electrons. (Negative)
P-type will have holes (positive). In junction there is a
depletion region: extra electrons go in holes. This create a
barrier for the other electrons. When battery is put in
good direction (negative on the cathode) there is a
forward bias and current flows. When bad direction
barriers expend and no current ->
DK
Anode cathode
15
Transistor (bipolar junction transistor) Half rectifier for AC (diods are non linear circuit
To amplify or switch electrical signal. Emitter and collector are connected to
p-type, base is connected to n-type.
elements)
N6
P
N
Morgan’s laws
17
20B B A +
=
-
A.A 0=
21 AB A B + A
+
=
19
Positional notation 24
A +A.B A =
22
>
25 ↑29 Optical telegraph
*
base 16
*
26 Decimal to hex example
Used the chappe code
In 1838 the morse code was invented, replacing
optical links with electrical wires
*
Addition with binary
Signal-to-noise ratio (SNR or S/N) is a
measure that compares the level of a
desired signal to the level of
background noise. SNR is defined as
A
=>
- -
- the ratio of signal power to noise
power, often expressed in decibels. A
ratio higher than 1:1 (greater than
0 dB) indicates more signal than
noise.
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