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diodesSAMUEL NINO DAVID.SB.TECH (ECE) II YEAR115012013905
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SEMICONDUCTOR DIODES
The symbol used for a semiconductor diode in a circuit diagram specifies the type of diode. There are alternative symbols for some types of diodes, though the differences are minor.
The triangle in the symbols points to the forward direction.
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metal migrates into the semiconductor3
POINT-CONTACT DIODE
4 The 1N34 germanium version is still used
2 Metal wire is placed in contact
1 its construction is simpler
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P-N JUNCTION DIODE
1 It is made of a crystal of semiconductor
2
3
4 no charge carriers are present
5 The junction does not allow the flow of electrons
germanium and gallium arsenide are used
Impurities are added to it to create a region
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TYPES OF SEMICONDUCTOR DIODES
It consist of thin sharpened wire
Cat's whisker diodes were also called
as diodes
Crystal diode
These are type of point-contact diode
Tunnel diode
Region of operation showing negative resistance
It is caused by quantum tunneling
They are used in spacecraft.
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Electronic symbols of diodes
Diode Light emitting diode
Photo diode Schottky diode
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APPLICATIONS
•Radio demodulation•Power conversion
•Over-voltage protection•Ionizing radiation detectors•Temperature measurements
•Current steering•Waveform clipper and clamper
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RELATED DEVICES OF OPTICAL DIODES
OPTICAL DIODE
Rectifier
Transistor
Thyristor DIAC
Subtitle text
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Components of Diode
•P-Type semiconductor•N-Type semiconductor
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DIFFERENT SYMBOLS OF SCHOTTKY DIODES
SCHOTTKY BARRIER DIODE
SCHOTTKY DIODE
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RADIO DEMODULATION
A simple demodulator circuit
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POWER CONVERSION AC TO DC POWER SUPPLY
Rectifiers are constructed from diodes
1Ex: Automotive Alternators2
Provides better performance than commutator or dynamo
3
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Thank you slide
Samuel nino david
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