57.3.8. Common Source and Common Drain Performance

Try these first

1. 1.

   What is the main purpose of a common source amplifier?

   Hint

   Think about what amplifiers do best.

2. 2.

   Define the common drain configuration.

   Hint

   Consider what it does for the circuit.

3. 3.

   What configuration provides a high voltage gain?

   • Common Source
   • Common Drain
   • Common Emitter

   Hint

   Think about amplifiers and their roles.

4. 4.

   True or False: The common drain configuration decreases the output resistance of an amplifier.

   • True
   • False

   Hint

   Recall the function of buffering.

5. 5.

   Given a common source amplifier with a voltage gain of 50 and a common drain stage that has a gain close to 1, calculate the overall voltage gain of the combined configuration.

   Hint

   Remember that the gains multiply.

6. 6.

   Explain the impact of increasing the input resistance in a Darlington pair configuration on amplifier performance.

   Hint

   Consider how input resistance affects signal integrity.