7.9. BJT as an Amplifier

Try these first

1. 1.

   What does a BJT amplify?

   Hint

   Think about what an amplifier does.

2. 2.

   In which region does a BJT operate as an amplifier?

   Hint

   It's the state that allows for amplification.

3. 3.

   In which region does the BJT operate as an amplifier?

   • Saturation
   • Cut-Off
   • Active

   Hint

   Recall the operational states of the transistor.

4. 4.

   True or False: The collector current is always greater than the base current in a BJT amplifier.

   • True
   • False

   Hint

   Think about how current flows in an amplifier.

5. 5.

   Design a simple audio amplifier circuit using a BJT and explain how it operates.

   Hint

   Think about the role of base current and circuit components.

6. 6.

   Analyze how temperature affects the performance of a BJT amplifier and suggest mitigation strategies.

   Hint

   Consider how BJTs behave under different thermal conditions.