Question 14.5: Calculating the Propagation Delay of a Simple Inverter Retur...
Calculating the Propagation Delay of a Simple Inverter
Return to the inverter of Fig. 14.17(a) and consider the case where a capacitor C is connected between the output node and ground. If at t = 0, vI goes low, and assuming that the switch opens instantaneously, find the time for vO to reach \frac{1}{2} (V_{OH} + V_{OL}). This is the low-to-high propagation time, tPLH . Calculate the value of tPLH for the case R = 25 kΩ and C = 10 fF.
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