60.2.1. Usefulness of Common Collector and Common Drain Stage

Try these first

1. 1.

   What configuration is also known as the emitter follower?

   Hint

   Think about the purpose of this configuration.

2. 2.

   How does the CC stage influence input resistance?

   Hint

   Consider the role of CC in amplifiers.

3. 3.

   What is the main advantage of the common collector stage?

   • A. Decreased voltage gain
   • B. Increased input resistance
   • C. Reduced current output

   Hint

   Think about its function as a buffer.

4. 4.

   True or False: The Darlington pair configuration reduces the input resistance.

   • True
   • False

   Hint

   Consider the benefits of transistor configurations.

5. 5.

   Given a CC-CE setup with specified resistors, calculate the total input resistance considering both stages.

   Hint

   Break down the calculations; consider the relationships established in our examples.

6. 6.

   Design a circuit using a Darlington pair for a specific gain requirement and analyze how it would differ from using a CC stage.

   Hint

   Focus on both input resistance and capacitance while designing the circuit.