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fa03-lw-s1 - ECE 2030G 4 problems 5 pages Problem 1(2 parts...

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ECE 2030G Computer Engineering Fall 2003 4 problems, 5 pages Exam One Solutions 18 September 2003 1 Problem 1 (2 parts, 20 points) Switch-level Design Part A (8 points) Transform each of the following Boolean expressions to a form where they can be implemented using switches (i.e., there should be no bars in the expression except for complements of the inputs A, B, C, etc.). The behavior of the expression should remain unchanged. ) ) ( ) ) ) (((( H F E D C B A Out X + + + + = H F E D C B A Out X + + + = ) ( ) ) ) ((( ) ) ) ) (((( E D C B A Out Y + + = E D C B A Out Y + + = ) ) ) ((( Part B (12 points) Two incomplete circuits are shown below. Complete each circuit by adding the needed switching network so the output is pulled high or low for all combinations of inputs (i.e., no floats or shorts). Then write the expression. Assume both the inputs and their compliments are available. Out y A D C B A Out x C E D C D E A D C B E D C OUT X + = D C B A OUT Y + =
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ECE 2030G Computer Engineering Fall 2003 4 problems, 5 pages Exam One Solutions 18 September 2003 2
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