21.6. Linearization of non-linear circuit containing MOSFET (Contd.)

Try these first

1. 1.

   What does the small signal equivalent model focus on?

   Hint

   Think about what happens in a circuit when conditions are slightly changed.

2. 2.

   Define transconductance (g_m) in your own words.

   Hint

   Consider what happens at the gate-source connection.

3. 3.

   What is the small signal equivalent model primarily used for?

   • Predicting circuit behavior
   • Calculating power loss
   • Increasing non-linearity
   • Adjusting DC voltage

   Hint

   Think about what we hope to achieve by using this model.

4. 4.

   True or False: Output conductance (g_d) is important for assessing the stability of a circuit.

   • True
   • False

   Hint

   How can changes in voltage influence the current?

5. 5.

   Given a MOSFET with a K value of 150 µA/V² and V_th of 2V, calculate g_m when V_gs is 5V, then analyze what this means for circuit behavior.

   Hint

   Consider how the responsiveness affects circuit performance.

6. 6.

   For a given MOSFET, derive an expression for g_d and explain the impact of varying λ on circuit performance.

   Hint

   Luxuriate in how this sensitivity affects practical scenarios in circuit design.