13.3.2. Example on p-MOS Transistor

Try these first

1. 1.

   What happens in the saturation region of a p-MOS transistor?

   Hint

   Think about the relationship between current and voltage in this region.

2. 2.

   Define the threshold voltage.

   Hint

   What is the voltage level where the transistor starts conducting?

3. 3.

   What is the function of the threshold voltage in a p-MOS transistor?

   • To turn the transistor off
   • To turn the transistor on
   • To stabilize current

   Hint

   It’s a key point for conducting.

4. 4.

   True or False: The saturation current in a p-MOS transistor depends linearly on the gate voltage.

   • True
   • False

   Hint

   Think more about the saturation characteristics.

5. 5.

   Given a p-MOS transistor with K_p = 1 mA/V², V_SG = -3V, and V_SD = -1V with V_th = -2V, determine the current and which region the transistor operates in.

   Hint

   Use the provided equations based on operating region.

6. 6.

   Assess a p-MOS with V_th = -1.5V, and input parameters V_SG = -2.5V, V_SD = -2V. State if it’s in cutoff, triode or saturation.

   Hint

   Calculate the effective states carefully.