20.1. Linearization of Non – Linear Circuit Containing MOSFET

Try these first

1. 1.

   What is the role of the Q-point in a MOSFET circuit?

   Hint

   Look for descriptions about operational characteristics of a circuit.

2. 2.

   Define transconductance in your own words.

   Hint

   Think about the relationship between input voltage and output current.

3. 3.

   What is the main purpose of linearizing a non-linear circuit with a MOSFET?

   • To increase non-linearity
   • To simplify analysis
   • To ensure stability

   Hint

   Think about why engineers prefer simpler models.

4. 4.

   True or False: The small signal model assumes variations are large.

   • True
   • False

   Hint

   Recall the definition of small signal analysis.

5. 5.

   For a given MOSFET with K = 0.5 m/A² and V_th = 1 V, calculate the small signal current i_ds for small variations around V_gs of 2 V.

   Hint

   Use the quadratic approximation to determine changes in current.

6. 6.

   Discuss the effects of varying R_D in a common source amplifier on both gain and output voltage.

   Hint

   Consider how resistance impacts current and voltage within the amplifier.