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# homework1 - the inputs is also available You are to...

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Computer-aided IC Design/VLSI I Spring 2010 (Prof. David Pan) Homework #1: Assigned Jan. 27, due Feb. 3 1. Minimize the following Boolean equations to eliminate redundancy (a' means the complement of a). a) ac + bdc + ca' b) (x+y)(x+z) c) a(b+c+d) + b(c+d+a) + c(d+a+b) + d(a+b+c) 2. Sketch the transistor-level schematic for a single-stage CMOS logic gate for the function, Y = (AB + C.(A + B))' 3. This problem relates to the design of circuits using multiplexer modules. A 2-to-1 multiplexer module is shown below (the transistor circuit for this was discussed in class). Three of these modules can be combined to produce a 4-to-1 multiplexer. Any 2-input logic function can be implemented using this 4-to-1 multiplexer with the two inputs fed to the select line and the truth table entries appropriately fed to the input lines. However, a 4- to-1 multiplexer can also implement a 3-input logic function if the complement of one of

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Unformatted text preview: the inputs is also available. You are to implement the logic function given below using three of the 2-to-1 multiplexer modules. (a) Design a gate-level implementation of the above function using multiplexer modules made of NAND/NOR gates. (b) How many transistors are needed for the gate level implementation? (c) If the same function is implemented using multiplexers with transmission gates, what would be the number of transistors needed for this implementation? 4. Draw the transistor schematic representing the circuit below. Can you describe the function of the circuit? Is this cell easy to "tile" in the vertical direction? The horizontal direction? Explain. 5. Problem 1.3 from the Exercises for Chapter 1. 6. Problem 1.8 from the Exercises for Chapter 1....
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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.

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homework1 - the inputs is also available You are to...

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