14.1.5. Signal Amplification

Try these first

1. 1.

   What does the common emitter configuration refer to?

   Hint

   Think about the transistor terminals.

2. 2.

   What is the significance of the current gain (β) in a BJT?

   Hint

   Consider the relationship between base and collector currents.

3. 3.

   What is the primary function of the common emitter configuration?

   • To amplify signals
   • To switch signals
   • To rectify signals

   Hint

   Think about the primary role of amplifiers.

4. 4.

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

   • True
   • False

   Hint

   Consider the relationship of currents in a BJT.

5. 5.

   Design a common emitter amplifier circuit given a supply voltage of 15V, a resistor value of 2kΩ for the collector, and a base current of 5 mA. Calculate the expected output voltage.

   Hint

   Start by calculating the collector current using the current gain.

6. 6.

   If the early voltage is not considered in a given BJT circuit analysis, how might the output characteristics differ from actual performance?

   Hint

   Reflect on how parameters affect circuit behavior.