7.6.1. Junction Current

Try these first

1. 1.

   What are the three regions of a BJT?

   Hint

   Think about the layers of the transistor.

2. 2.

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

   Hint

   Consider what forward bias means.

3. 3.

   What happens to current in a BJT when the base-emitter junction is forward biased?

   • Current flows
   • Current is blocked
   • Voltage drops

   Hint

   Recall the meaning of forward bias.

4. 4.

   Is it true that reverse bias prevents current flow in the base-collector junction?

   • True
   • False

   Hint

   Think about what reverse bias means.

5. 5.

   Given a BJT operation with a forward bias of 0.7V, calculate the expected collector current assuming I0 = 0.01 mA and V_T = 25mV.

   Hint

   Use the exponential relationship in the current equation.

6. 6.

   Discuss how varying the base-collector potential while keeping base-emitter bias constant influences the overall BJT operation.

   Hint

   Think about how reverse bias modifications affect charge flow.