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Homework2

# Homework2 - 4 Use the schematic editor to create a circuit...

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Digital Logic Homework University of Information Technology - Computer Engineering Faculty Page 1 Homework2 1. Construct a timing diagram for the circuit shown below, assuming inputs ABC are all low from time 0 to 10, ABC =LLH from time 10 to 20 (where L denotes low, H denotes high), ABC =LHL from time 20 to 30, ABC =LHH from time 30 to 40, ABC =HLL from time 40 to 50, ABC =HLH from time 50 to 60, ABC =HHL from time 60 to 70, ABC =HHH from time 70 to 80. 2. Show the truth table of all possible input values for the following logic circuit

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Digital Logic Homework University of Information Technology - Computer Engineering Faculty Page 2 3. Write the Boolean expressions for the outputs in Problems 1 and 2
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Unformatted text preview: 4. Use the schematic editor to create a circuit with a single OR gate, plus input and output terminals. Use the logic simulator to show how the output changes for all input values. Hand in printouts of the schematic and the logic simulation run. 5. Using a truth table, demonstrate that: XY + YZ + XZ = XY + YZ + XZ 6. Using a truth table, prove DeMorgans Theorem for three variables: (XYZ) =X+Y + Z. 7. Draw a logic diagram that directly corresponds to each of the expressions shown below. ( a ) AB + A C D + A B D + A B CD ( b ) B + A C D ( c ) ( A + B + C + D )( A + B + C + D )...
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