32.1. Common Source Amplifier (Part A)

Try these first

1. 1.

   What is the primary function of a common source amplifier?

   Hint

   Think about the main purpose of any amplifier.

2. 2.

   What does biasing refer to in the context of amplifiers?

   Hint

   Focus on how the amplifier is kept in the right operating condition.

3. 3.

   What is the role of biasing in a common source amplifier?

   • To increase AC signals
   • To stabilize operating conditions
   • To adjust output frequency

   Hint

   Consider what stabilizing the amplifier means.

4. 4.

   True or False: The common source amplifier can only output voltage signals.

   • True
   • False

   Hint

   Think about the flexibility of output types.

5. 5.

   Calculate the required gate voltage for a common source amplifier if the desired output current is 1 mA and the threshold voltage is 1V, given a transconductance factor K of 100 μA/V².

   Hint

   Think about how you isolate the voltage in relation to the threshold.

6. 6.

   Design a common source amplifier configuration that can amplify an input signal of 10 mV to 1 V, while ensuring the transistor remains in saturation. Describe your approach.

   Hint

   Remember to consider both the required gain and saturation conditions.