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hw04_SLN

# hw04_SLN - ECE 211 HW4 SOLUTIONS p 1 of 5...

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ECE 211 HW4 SOLUTIONS p 1 of 5 //home/vdimitrov/7217/050a48c67a14b03304899d14afb8e4c255431cd4.doc HW Set 4 – SOLUTIONS 1. For the circuit shown: (a) Obtain a logic expression for F. (b) Construct a Truth Table to evaluate F for all combinations of A, B truth values. (c) Do you recognize the function F? Solution: (a) F = A ( A' + B' ) + B ( A' + B' ) (b) A B (A' + B' ) A (A' + B' ) B (A' + B' ) F = A ( A' + B' ) + B ( A' + B' ) 0 0 1 0 0 0 0 1 1 0 1 1 1 0 1 1 0 1 1 1 0 0 0 0 (c) F is the exclusive-OR combination of A, B: F = A B

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ECE 211 HW4 SOLUTIONS p 2 of 5 2. For the circuit shown, obtain a logic expression for F. Solution: F = ( A' + C' ) · ( A + B' )
ECE 211 HW4 SOLUTIONS p 3 of 5 3. Obtain two logic gate circuit realizations of the logic expression F(A, B, C, D) = ( A· B ' ) + ( A · C ' ) + ( B · C · D ' ) with: F, A active-High; B, C, D active-Low. Neatly draw your circuit using Positive Logic Notation. One Solution:

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ECE 211 HW4 SOLUTIONS p 4 of 5 4. Temperature is monitored at four points of a certain system. An alarm must sound iff the temperature exceeds 30 ° C at at least two locations.
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hw04_SLN - ECE 211 HW4 SOLUTIONS p 1 of 5...

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