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Unformatted text preview: onresistance of 5 KOhms. The total source and drain (diffusion) capacitances of an nchannel transistor are 5 fF each. The parasitic (wiring, etc.) capacitances are shown lumped at the internal nodes. The output load capacitance shown (50 fF) includes the diffusion capacitance of the PNetwork, wiring capacitances, and the driven gate capacitances. (a) Assume that all load and internal capacitances have been charged to V DD . Which input input vector will result in the longest t pdf ? Explain your answer. (b) Assuming all the capacitors are initially charged to V DD , use the Elmore delay approximation to find the value of t pdf for the input vector ABCDE = 10111....
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 Spring '10
 PAN

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