15.2.1. I-V Characteristic at the Base

Try these first

1. 1.

   What is the common emitter configuration?

   Hint

   Think about the input and output locations in a circuit.

2. 2.

   Define collector current.

   Hint

   Consider the paths leading from the emitter to the collector.

3. 3.

   What does a common emitter configuration primarily do?

   • Increase voltage
   • Amplify current
   • Reduce power

   Hint

   What happens to currents in this configuration?

4. 4.

   True or False: The Q-point should always stay within the saturation region for optimal performance.

   • True
   • False

   Hint

   Consider how the Q-point affects output linearity.

5. 5.

   In a common emitter circuit, if the base current is 20 μA and β = 150, what is the collector current? If the load resistance is 1kΩ, calculate the output voltage if the supply voltage is 10V.

   Hint

   Use the relationship between Ib, Ic, and load resistance effectively.

6. 6.

   Discuss the effects on the output voltage if the load resistance is decreased in a common emitter amplifier and explain why this happens.

   Hint

   Consider Ohm's law and the impact on voltage as current increases.