9.4.2. Application of Equivalent Circuit in Analysis

Try these first

1. 1.

   Define what biasing means in the context of transistors.

   Hint

   Think about the voltage necessary to set up active operation.

2. 2.

   Name the two main types of bipolar junction transistors.

   Hint

   Consider their charge carriers.

3. 3.

   What junctions need to be forward-biased in an n-p-n transistor?

   • Base-collector
   • Base-emitter
   • Collector-emitter

   Hint

   Think about which junction allows connections to the emitter directly.

4. 4.

   True or False: In a p-n-p transistor, the collector current is the same direction as the emitter current.

   • True
   • False

   Hint

   Recall the direction of current in terms of charge carriers.

5. 5.

   Design a circuit using a p-n-p transistor that requires a specific collector current of 5mA, given a base current of 50µA. Ensure to calculate the appropriate β needed.

   Hint

   Use the formula relating I_C to I_B.

6. 6.

   If an n-p-n transistor operates with a collector voltage of 12V and a collector current of 3mA, what is the power delivered to it, assuming the base-emitter voltage remains constant at 0.7V?

   Hint

   Power is calculated using the voltage across and the current through a device.