Exam2 Solutions Wi 11

# Exam2 Solutions Wi 11 - (10 pts 2 3 Design a 3-to-8-line...

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ECE 261 Name: Wi. 2011 EXAM 2 SOLUTIONS (Closed book. You are allowed 2 single-sided sheets of notes. Show your work and write the answer in the space provided) 1. You are to use an 8-bit signed 2’s complement representation and arithmetic in this problem. You are given the decimal numbers A=33, B=17 and C=15. a) Show the representation for: (10 pts ) c) Perform the same operations in 1’s complement arithmetic ( 10 pts ) 1

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2. a) Write the equation for the output Y of a 4-to-1-line multiplexer with inputs D0-D3, and select lines S0, S1 in sum-of-products form (10 pts) b) Draw the circuit using AND, OR and NOT gates. (10 pts ) c) Convert to NAND and NOT gates.

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Unformatted text preview: (10 pts ) 2 3 . Design a 3-to-8-line decoder with inputs A2, A1, A0 and outputs D0, D1, ….D7, by writing the equations for the outputs. Show the general structure of the circuit, you do not need to draw every gate. (15 pts) 3 4. The sequential circuit shown below has two D flip-flops, one input x and one output z. a) Write the equations for the flip-flop inputs D1 and D2 and the output z . ( 10 pts.) b) Is this a Mealy or a Moore type? Explain your answer. (5pts) Moore type, output z is a function of the present state only. c) Derive the 2-dimensional state table. (10 pts.) 4...
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## This note was uploaded on 04/05/2011 for the course ECE 261 taught by Professor Staff during the Winter '08 term at Ohio State.

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Exam2 Solutions Wi 11 - (10 pts 2 3 Design a 3-to-8-line...

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