9.3.2. Collector Base Junction Biasing

Try these first

1. 1.

   What does biasing a BJT do?

   Hint

   Think about the role of a transistor in amplification.

2. 2.

   Define the term I-V Characteristic.

   Hint

   What graphically represents current against voltage fluctuations?

3. 3.

   What is the primary function of biasing in BJTs?

   • To amplify signals
   • To set the operating point
   • To improve efficiency

   Hint

   Consider how biasing affects operational states.

4. 4.

   In which condition does a BJT operate as an amplifier?

   • True
   • False

   Hint

   Recall the active region characteristics.

5. 5.

   A circuit uses a BJT in an amplifier configuration. If V_BE is measured to be 0.7 V and the base current is 20 μA, calculate the expected collector current given β = 150.

   Hint

   Use the current gain formula for BJTs.

6. 6.

   Design a circuit with a BJT where you need to achieve a collector current of 5 mA. If your desired β is 200, what should be the base current?

   Hint

   Apply the formula that relates collector current and base current.