7.1. What is a BJT?

Try these first

1. 1.

   What does BJT stand for?

   Hint

   Remember the full form of BJT.

2. 2.

   Name the three terminals of a BJT.

   Hint

   Think about the structure of the transistor.

3. 3.

   What type of charge carriers does an NPN transistor use?

   • Electrons
   • Holes
   • Both

   Hint

   Recall the types of carriers in NPN and PNP transistors.

4. 4.

   True or False: The base of a BJT is heavily doped.

   • True
   • False

   Hint

   Think about the doping levels of different terminals.

5. 5.

   Design a simple circuit that uses an NPN transistor to switch an LED on and off with a base current from a microcontroller. Explain the process involved.

   Hint

   Consider how the transistor acts like a switch depending on the base current.

6. 6.

   Explain the advantages and disadvantages of using BJTs compared to MOSFETs in circuit design.

   Hint

   Focus on the key differences in operation and performance characteristics.