45.3. Common Drain Stage Analysis

Try these first

1. 1.

   What is a common-drain amplifier typically used for?

   Hint

   Think about where you'd want impedance matching.

2. 2.

   In a common-drain stage, how is the voltage gain characterized?

   Hint

   Consider the behavior of input versus output voltages.

3. 3.

   What is the primary role of a common-drain amplifier?

   • To increase voltage output
   • To buffer signals
   • To amplify current
   • None of the above

   Hint

   Consider functions common in amplifier designs.

4. 4.

   True or False: The voltage gain of a common-drain amplifier is generally less than 1.

   • True
   • False

   Hint

   Think about output performance versus input signal.

5. 5.

   Design a common-drain amplifier with specified loading conditions and predict its voltage gain experimentally. What factors might affect your theoretical vs. practical gain?

   Hint

   Review how model assumptions can differ when applied to real circuits.

6. 6.

   Analyze a common-drain amplifier given V_in and R_L values considering parasitic capacitance. How would the frequency response be altered?

   Hint

   Identify how capacitance interacts with resistance to filter higher frequencies.