Please enable JavaScript.
Coggle requires JavaScript to display documents.
SEMICONDUCTORS, N-type semiconductor joint with P type semiconductor =…
SEMICONDUCTORS
TYPES
EXTRINSIC
semiconductors (doped)
P-type
semiconductor
Trivalent impurity
Majority charge carriers: HOLES
Overall neutral
P-N JUNCTION DIODE
Forward biased- P(+ve) N(-ve)
Light Emitting Diode LED
Reverse biased: P(-ve) N(+ve)
Photo Diode
N-type
semiconductor
Pentavalent Impurity
Majority charge carriers: ELECTRONS
Overall Neutral
INTRINSIC
semiconductors (pure)
TRANSISTOR
TYPES
PNP
E-C-B !
NPN
E-C-B
AMPLIFIER
Base-emitter junction = forward biased
Base collector junction = reverse biased
SWITCH
Closed: both junctions - forward biased
Opened: both junctions - reverse biased
Mode Of Operation
.
COMMON EMITTER CONFIGURATION- emitter grounded
COMMON BASE CONFIGURATION- base grounded
COMMON COLLECTOR CONFIGURATION- collector grounded
N-type semiconductor joint with P type semiconductor = diode
3 terminal device
2 junctions
Emitter, Base, Collector
AS
forms
2 terminal
Neutral device
Flow is unidirectinal
Current carriers:
electrons
Conventional current
Electronic current
Current carriers:
holes
e.g
e.g
e.g SILICON
