7.3.2. MOS Characteristic

Try these first

1. 1.

   What are the three terminals of a BJT?

   Hint

   Consider the configurations in which the BJT operates.

2. 2.

   What happens when the base-emitter junction is forward biased?

   Hint

   Think about how charge carriers move under applied voltages.

3. 3.

   What is the main function of the emitter in a BJT?

   • To emit charge carriers
   • To collect charge carriers
   • To control current

   Hint

   Think about the direction current flows in this terminal.

4. 4.

   True or False: The collector of a BJT is always forward biased.

   • True
   • False

   Hint

   Recap the bias configurations we discussed.

5. 5.

   Calculate the current through a BJT if the base current is 20µA and the collector current is 100µA. What is the total current?

   Hint

   Remember to add the base and collector currents.

6. 6.

   Discuss the impact on a BJT's performance if the base doping concentration is significantly increased. What would happen to the current flow?

   Hint

   Consider how doping affects charge-carrier dynamics.