45.3.1. Common Drain Stage with R

Try these first

1. 1.

   What does the common drain amplifier configuration imply?

   Hint

   Think about where the output is taken from.

2. 2.

   Define voltage gain in context to amplifiers.

   Hint

   It's a ratio, consider what happens to the signal strength.

3. 3.

   What is a primary characteristic of a common drain amplifier?

   • High Output Resistance
   • High Input Resistance
   • Negligible Voltage Gain

   Hint

   Consider its role as a buffer.

4. 4.

   True or False: Adding resistance R decreases the output resistance of the common drain stage.

   • True
   • False

   Hint

   Think about what primarily controls output resistance.

5. 5.

   Propose a design where a common drain amplifier improves signal integrity in a noisy environment. Explain your rationale for the resistor values chosen.

   Hint

   Consider how noise affects signal in varying environments.

6. 6.

   Calculate the overall voltage gain of a common drain stage with R = 100kΩ while noting transconductance g_m = 3mS. Describe how changes in R would affect the circuit's output.

   Hint

   Calculate based on the formulas covered earlier.