38.1.2. Previous Discussions

Try these first

1. 1.

   What is the main purpose of a coupling capacitor?

   Hint

   Think about signal isolation and what the capacitor does.

2. 2.

   What does self-biasing achieve in an amplifier?

   Hint

   Consider the concept of feedback in maintaining stability.

3. 3.

   What is the purpose of a coupling capacitor in an amplifier?

   • Block AC signals
   • Block DC signals
   • Allow both AC and DC to pass

   Hint

   Think about the function of capacitors in circuits.

4. 4.

   True or False: Self-biased amplifiers are less stable than fixed bias amplifiers.

   • True
   • False

   Hint

   Consider the advantages of self-biasing.

5. 5.

   Design a self-biased CE amplifier for a given application (e.g. audio frequency amplification). Include calculations for component selection and draw the schematic.

   Hint

   Review your fundamental design principles about gain and stability.

6. 6.

   Given a circuit diagram of a self-biased amplifier, analyze the expected frequency response. Evaluate what changes would alter the response curve.

   Hint

   Use graphical plots to visualize the response characteristics.