38.1.5. Numerical Examples

Try these first

1. 1.

   What is the purpose of using a coupling capacitor in a circuit?

   Hint

   Think about AC versus DC signal behavior.

2. 2.

   Define self-biasing in amplifiers.

   Hint

   Consider how feedback influences circuit stability.

3. 3.

   What does self-biasing help to maintain in an amplifier?

   • Gain
   • Stability
   • Frequency response
   • Power

   Hint

   Think about the advantages of using feedback.

4. 4.

   True/False: The cutoff frequency indicates the range of effective operation for an amplifier.

   • True
   • False

   Hint

   Recall the definition of cutoff frequency.

5. 5.

   Design a self-bias common emitter amplifier for a specific frequency response (e.g., 20Hz - 20kHz). Calculate all required component values.

   Hint

   Use the formulae for both cutoff and biasing calculation.

6. 6.

   Analyze a given amplifier circuit diagram and derive the total input and output resistance.

   Hint

   Focus on parallel and series resistor combinations.