Summary Theory electronics for EEP

Theory : Electronics
Lecture 1 :




Difference between electric and electronic engineering.
↳ "Electronics comprises the physics and
engineering that deal with the flow of

electrons in vacum , gas ,
and semiconductors .
"




Electrical passive effect components (such resistances,
↳ engineering uses as



capacitances and inductances /

Electronic devices (such transistors) to control electron
↳ engineering uses active as



flow
by amplification and rectification .




Active components - Battery ,
Generator ,
Transistor

Passive components - Resistor ,
Capacitor ,
Inductor ,
Diode




Diodes Direction of current flow I

Use semi-conductor materials Anode Cathode
(+ ) G)



↳ def : a diode is a two-terminal electronic component that
only conducts current in de direction


↳ an ideal diade will have O resistance in one direction ,
and infinite resistance in the reverse direction .


(Direction of current flow does not matter (


Capacitors -
use non-conductive materials Anode Cathode
(t) ()
~


air ,
or
paper ,
or plastic ,
...




↳ def : a capacitor is a two-terminal electric comparent that never conducts curent
.




↳ positive charges accumulate on the surface of the anode.




Resistors -

use conductive (but resistive) materials (Direction of current flow does not matter (


Anode Cathode
(t) ()

, Direction of current flow I REVERSE-open circuit

Diodes-use semi-conductive materials Anode PN Cathode
(t) ()

Direction of current flow I FORWARD -
short circuit


Anode PN Cathode
(t) ()




Transistors


Active dependent source of current


PNP 3 Emitter
Base

A
Collector



les
2
Emitter PNP
Base ()
(+ )

concton Emitter 1 collector




A

Ideal diode as a non-linear coriented) circuit element - actual diode
ideal
diode
-




- i(t) = (eu(t) -
1)
-




1 1. . 17


forward
current
M




Real current flow intensity depending on
voltage tension > forward
voltage




Puzzle with diodes
games
which
lamps are
bright ?




De
-
Exercises p . 24 (ex 2 .
5)