11.7.2 - Next Steps for PMOS Transistors
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Practice Questions
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What does I_DS represent in a PMOS transistor?
💡 Hint: Think about what current flows in a transistor.
Define V_th.
💡 Hint: What voltage allows the PMOS to turn on?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary factor determining I_DS in a PMOS transistor?
💡 Hint: Think about how you can change resistance.
In which region does a PMOS transistor primarily remain in constant current mode?
💡 Hint: Does the current change much when voltage increases in saturation?
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Challenge Problems
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Describe how the pinch-off condition affects the PMOS transistor and calculate the impact on I_DS if V_DS = V_GS - V_th.
💡 Hint: Visualize it as the current ceasing to increase beyond a certain V_DS.
Given a PMOS with W = 20µm, L = 2µm, V_GS = 5V, V_th = 2V, and V_DS = 4V, find I_DS assuming K = 50μA/V^2.
💡 Hint: Break down the formula and substitute step by step.
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