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2 cards from this section. Quick, good the night before a test.
What does the drain current (I_DS) depend on in a MOSFET?
Think of how the dimensions affect current flow.
What does the term 'V_th' represent?
It’s related to when the device starts to conduct.
What happens to I_DS if V_DS increases significantly?
Consider the concept of pinch-off.
True or False: The gate-source voltage must be above the threshold voltage for the MOSFET to conduct.
Think about channel formation.
A MOSFET has a width of 15 um and a length of 5 um, a threshold voltage of 0.8V, and a gate-source voltage of 2.5V. Calculate the drain current assuming V_DS = 0.5V. Discuss the implications if V_DS were to increase significantly.
Use I_DS ∝ (V_GS - V_th) * V_DS, remember to check against the thresholds.
Analyze the operation of a MOSFET when the V_GS is less than V_th. What practical conclusions can be drawn regarding circuit design?
Think about thresholds for effective conduction.
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