Please enable JavaScript.
Coggle requires JavaScript to display documents.
SEMICONDUCTOR, Process of converting of AC into DC, forward,…
SEMICONDUCTOR
Materials that have electrical conductivity between conductors and insulators. Eg: Silicon, Germanium etc
Intrinsic semiconductor
These are chemically pure materials without any doping or impurity.
- It behaves as insulator at 0K.
- It starts conduction at a temp above 0K.
Extrinsic semiconductor
These are materials with an added impurity and are called doped semiconductors. It exhibits greater conductivity than intrinsic semiconductors.
N-type semiconductor
These are doped with pentavalent impurities. They have electrons as majority charge carriers and holes as minority charge carriers.
-
P-type semiconductor
These are doped with trivalent impurities. They have holes as majority charge carriers and electrons as minority charge carriers.
P-N Junction Diode
It is formed when a P-type and a N-type semiconductor are merged together.
- The P-N junction diode is a two terminal device.
- It allows current to pass in only one direction.
- A potential barrier is set up due to the positive and negative charges.
Biasing
Forward Biasing
- 1 more item...
Reverse Biasing
- 1 more item...
Transistors
It is a three terminal P-N Junction used to amplify electronic signals and can be used as a switch. The three regions it consists of are base, emitter and collector. The base is very thin and the collector and emitter have a greater concentration of impurities. It is a combination of the emitter base junction and the collector base junction.
- 2 more items...
-
Direct current
Current that flows in only one directional.
- Zero frequency
- Constant magnitude
- Produced from power sources
Photodiode
It generates current when exposed to light. It is also known as photosensor. It operates in reverse biased mode and converts light energy into electrical energy.
-
-
-
-
