1 Answer
BJT stands for **Bipolar Junction Transistor**. It is a type of transistor used in electronics to amplify or switch electronic signals. The word "bipolar" refers to the fact that the transistor uses both electron (negative charge) and hole (positive charge) carriers for operation.
A BJT has three main parts:
1. **Emitter**: This is where the charge carriers (electrons or holes) enter the transistor.
2. **Base**: This is the middle layer, where the small input current is applied, controlling the larger current flow between the collector and emitter.
3. **Collector**: This is where the charge carriers exit the transistor.
There are two types of BJTs:
- **NPN**: The majority charge carriers are electrons.
- **PNP**: The majority charge carriers are holes.
BJTs are widely used in amplification, switching, and signal modulation in many electronic circuits.
A BJT has three main parts:
1. **Emitter**: This is where the charge carriers (electrons or holes) enter the transistor.
2. **Base**: This is the middle layer, where the small input current is applied, controlling the larger current flow between the collector and emitter.
3. **Collector**: This is where the charge carriers exit the transistor.
There are two types of BJTs:
- **NPN**: The majority charge carriers are electrons.
- **PNP**: The majority charge carriers are holes.
BJTs are widely used in amplification, switching, and signal modulation in many electronic circuits.