13.2.2. Saturation Region

Try these first

1. 1.

   What is threshold voltage?

   Hint

   Think about the 'on' and 'off' states of the transistor.

2. 2.

   In which region does the MOSFET operate when V_GS is below the threshold?

   Hint

   Consider the functionality of the transistor related to V_th.

3. 3.

   What is the threshold voltage (V_th)?

   Hint

   Think about when the current flow starts.

4. 4.

   In which operating region is the MOSFET when current is stable and not dependent on V_DS?

   • Triode
   • Saturation
   • Cutoff

   Hint

   Recall the 'stable current' characteristic.

5. 5.

   Design a circuit using an n-MOSFET. Given the threshold voltage is 1V, determine the range of V_GS needed to keep the MOSFET in saturation when V_DS = 5V.

   Hint

   Remember the conditions for saturation when calculating ranges.

6. 6.

   For a p-MOSFET with a threshold voltage of -2V, if V_GS = -1V and V_SD = -3V, determine the operational region.

   Hint

   Examine the polarity differences in p-MOS configurations.