44.2. Common Drain Amplifier Analysis

Try these first

1. 1.

   What is the main advantage of using a common drain amplifier?

   Hint

   Think about how this affects load driving capabilities.

2. 2.

   Can you name one application for a common drain amplifier?

   Hint

   Consider where you want to maintain signal integrity.

3. 3.

   What is one primary benefit of the common drain configuration?

   • High Input Capacitance
   • Low Output Resistance
   • High Voltage Gain

   Hint

   Remember the basic definition of output characteristics.

4. 4.

   True or False: The voltage gain of a common drain amplifier is typically much greater than 1.

   • True
   • False

   Hint

   Recall our discussions about voltage amplification.

5. 5.

   A common drain amplifier has a transconductance of 2 mS and an output voltage of 5V. What is the output resistance?

   Hint

   Use the relationship established for output resistance calculating.

6. 6.

   Analyze how reducing the input capacitance in a real circuit could impact the frequency range of a common drain amplifier’s performance.

   Hint

   Consider the trade-offs of frequency response and stability.