Fall2001Test1b

# Fall2001Test1b - 1 00 01 11 10 00 1 01 1 1 1 11 1 1 10...

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ECE 2030 Fall 2001 Name: ____________________________________ This is a closed book, closed notes test. The time allotment is 50 minutes.

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Problem 1 (30 Points): Design switch circuits to implement the following logic. Give the number of transistors for each design. a) b) c) Explain why both n-type and p-type transistors are used in the circuit. D ) B AC ( F + = C ) D A ( C B F + + =
Problem 2 (24 Points): Use mixed logic to design the gate level circuits for the following logic. In each case, determine the number of transistors needed for the design. a) Use only NOR gates and NOT gates. b) Use only NAND gates and NOT gates. D B A C ) B A ( F + + = AD C B A F + =

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Problem 3 (10 Points): Use DeMorgan’s Law to reduce the expressions such that complements are done only on input signals (that is, remove all the “long bars”). a) b) ) Z W ( ) Y X ( F + = ) D C ( ) B A ( C AB F + + + =
Problem 4 (24 Points) Use the Karnaugh maps to simplify the expressions for F.

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Unformatted text preview: 1) 00 01 11 10 00 1 01 1 1 1 11 1 1 10 Prime Implicants Essential? ____________ _______ ____________ _______ ____________ _______ ____________ _______ ____________ _______ ____________ _______ Simplified SOP: ____________________________________________ 2) 00 01 11 10 00 01 X X 11 1 1 10 X 1 1 Simplified SOP: ____________________________________________ 3) 00 01 11 10 00 0 1 0 0 01 1 1 0 0 11 X 0 X 0 10 1 0 1 1 Simplified POS: ____________________________________________ CD AB CD AB CD AB Problem 5 (12 Points): Do the following number conversions: Convert 1011010.10 2 to base 10.___________ Convert 4BA.25 16 to binary. ____________ Convert 76 10 to base 16. _____________ Convert 280 10 to binary. _____________...
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Fall2001Test1b - 1 00 01 11 10 00 1 01 1 1 1 11 1 1 10...

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