homework4_sol

# Homework4_sol - Computer-aided IC Design/VLSI I(Prof David Pan Homework#4 Solution 1 Problem 4.19 from the Exercises for Chapter 4 NAND2 g=5/4 NOR2

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Computer-aided IC Design/VLSI I (Prof. David Pan) Homework #4 Solution 1. Problem 4.19 from the Exercises for Chapter 4 NAND2: g=5/4; NOR2: g=7/4. The inverter has a 3:1 P/N ratio and 4 units of capacitance. The NAND has a 3:2 ratio and 5 units of capacitance, while the NOR has a 6:1 ratio and 7 units of capacitance. 2. Problem 4.24 from the Exercises for Chapter 4 F = (10pF/20fF) = 500. N=log 4 F = 4.5. Use a chain of four inverters with a stage (note: 5 stages would work for the capacitance, but the polarity of the signal would be inverted). D=4F 1/4 + 4 = 22.9 τ = 4.58 FO4 delays. 3. Problem 4.28 from the Exercises for Chapter 4 Dynamic power consumption will go down because it is quadratically dependent on V DD. Static power will go up because subthreshold leakage is exponentially dependent on V t . 4. Problem 6.10 from the Exercises for Chapter 6 NAND3: Hi-skew, g u = 7/6, Lo-skew: g d = 4/3 NOR3: Hi-skew, g u = 13/6, Lo-skew: g d = 4/3 5. Problem 6.12 from the Exercises for Chapter 6

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## This note was uploaded on 11/21/2010 for the course EE 360R taught by Professor Pan during the Spring '10 term at University of Texas at Austin.

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Homework4_sol - Computer-aided IC Design/VLSI I(Prof David Pan Homework#4 Solution 1 Problem 4.19 from the Exercises for Chapter 4 NAND2 g=5/4 NOR2

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