chapter 9 electronics.ppt

8/19/2019 CHAPTER 9 electronics.ppt

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CHAPTER 9

ELECTRONICS


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What is Thermionic Emission?

• Thermionic Emission is the release of electrons from a

heated metal cathode

Filament cathode anode


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9.2 SEMICONDUCTOR DIODES

• Semiconductor is a group of materials

that can conduct better than insulators

but not as good as metal conductors.

The examples of pure semiconductor:

• Silicon• Germanium

• Selenium


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What is the “doping process?

• Doping is a process of adding a certain

amount of other substances called

dopants such as Antimony and Boron to

a semiconductor, to increase its

conductivity .


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n!t"pe semiconductors


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p!t"pe semiconductors


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What is the function of semiconductor diode ?

• The function of semiconductor diode is to allow

current to flow through it in one direction only.


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What the meaning of rectification?

• Rectification is a process to convert analternating current into a direct current by

using a diode.


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chapter 9 electronics.ppt

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