SureDen
Logic gates
OR gate
Boolean expression Y=A+B
Doped or Extrinsic semiconductors:
N-Type:
P-N Junction As a Rectifier
Type of rectifier
Half wave rectifier
Energy bands in solids consists of three parts
Valence &n
Junction transistors
Junction transistors are of two types
(a) NPN
The P-N junction Diode:-
P side of P-N junction has holes as a majority charge carriers and electrons as a minority charge carriers whereas N side
Doping:
Intrinsic semiconductors show very low conductivity and thus cannot be used practically. Thus, the conductivity of intrinsic semiconductors is increased by
Mode of operations of PN-Junction Diode:
Forward Bias:- In this mode P side is connected to positive terminal of battery an
Transistor as an oscillator
Use→to convert D.C. into A.C.
Amplifier section is just a transistor used in common-emitter code.
Intrinsic semiconductors:- Intrinsic semiconductors have an equal number of negative and positive charge carriers.
ne = nh
Photodiode
When a light of proper wavelength falls on the junction, new electron-hole pairs are created. The n
Yet to be uploaded
Zener diode:
A diode operated in Zener break down mode is called Zener diode. In this type of mode of operation current increase r
Yet to be uploaded
Yet to be uploaded
Yet to be uploaded
Yet to be uploaded
Light-emitting Diode (LED):
When a conduction electron makes a transition to the valence band to fill up a hole in P-N &nbs
Transistor as an Amplifier
Common base amplifier
In this type amplifier, base to emitter junction is forward bias where
Electrical Properties
Solids show a variety of range of electrical conductivities. Electrical conductivity is the reciprocal of resistivity. Resist
As we know that
ρ=m
PRE Board E
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