6.2 Consider switching delays in a 10-kΩ resistive-load inverter circuit with a 1pF load capacitance, where
• µn·Cox=10
• W/L=10
• VT = 1.0 V
(a). Find tPHL (50%high-to-low transistion delay) by using the average current method. Assume that the input signal is an ideal rectangular pulse switching between 0 and 5V with zero rise/fall times. You will need to calculate V0L to solve this problem.
(b). By using an appropriate differential equation and the proper initial voltage across the capacitor (when the input voltage is at V0H) which is V0L and not 0V, calculate tPLH Use the same input voltage as in part (a).
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