59.1.5.1. Numerical Examples (Part B)

Try these first

1. 1.

   What is a common source amplifier?

   Hint

   Think about how voltage gain is achieved.

2. 2.

   Define transconductance.

   Hint

   What relationship does it describe between input and output?

3. 3.

   What is the typical voltage gain of a common source amplifier?

   • 1
   • 6
   • 10

   Hint

   Consider practical values of gain derived from examples.

4. 4.

   True or False: Cascading a common source amplifier with a common drain stage will always decrease the overall gain.

   • True
   • False

   Hint

   What is the function of the common drain stage?

5. 5.

   If the cutoff frequency increased from 530 kHz to 4.24 MHz after cascading, what factors contributed to this change?

   Hint

   Examine both stages' contributions to bandwidth.

6. 6.

   Given a common source amplifier with transconductance of 2 mA/V and a load resistance of 5 kΩ, calculate the gain and compare it with an output stage of a common drain with a capping gain of 1.

   Hint

   Use the defined gain formulas for each configuration.