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Digital Electronics
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Combinational Logic Analysis
Comments
Question
Implementing the expression AB + CDE using NAND logic, we get:
Options
A. (A)
B. (B)
C. (C)
D. (D)
Correct Answer
(A)
Combinational Logic Analysis problems
Search Results
1. One of De Morgan's theorems states that
. Simply stated, this means that logically there is no difference between:
Options
A. a NOR and an AND gate with inverted inputs
B. a NAND and an OR gate with inverted inputs
C. an AND and a NOR gate with inverted inputs
D. a NOR and a NAND gate with inverted inputs
Show Answer
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Correct Answer: a NOR and an AND gate with inverted inputs
2. The expression W(X + YZ) can be converted to SOP form by applying which law?
Options
A. associative law
B. commutative law
C. distributive law
D. none of the above
Show Answer
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Discuss
Correct Answer: distributive law
3. Which output expression might indicate a product-of-sums circuit construction?
Options
A.
B.
C.
D.
Show Answer
Scratch Pad
Discuss
Correct Answer:
4. From the truth table below, determine the standard SOP expression.
Options
A.
B.
C.
D.
Show Answer
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Discuss
Correct Answer:
5. Which of the following combinations cannot be combined into K-map groups?
Options
A. corners in the same row
B. corners in the same column
C. diagonal
D. overlapping combinations
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Correct Answer: diagonal
6. A 4-variable AND-OR circuit produces a 0 at its Y output. Which combination of inputs is correct?
Options
A. A = 0, B = 0, C = 1, D = 1
B. A = 1, B = 1, C = 0, D = 0
C. A = 1, B = 1, C = 1, D = 1
D. A = 1, B = 0, C = 1, D = 0
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Correct Answer: A = 1, B = 0, C = 1, D = 0
7. One possible output expression for an AND-OR-Invert circuit having one AND gate with inputs A, B, and C and one AND gate with inputs D and E is ________.
Options
A.
B.
C.
D.
Show Answer
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Correct Answer:
8. Before an SOP implementation, the expression
would require a total of how many gates?
Options
A. 1
B. 2
C. 4
D. 5
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Correct Answer: 5
9. A 4-variable AND-OR-Invert circuit produces a 0 at its Y output. Which combination of inputs is correct?
Options
A.
B.
C.
D. none of the above
Show Answer
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Discuss
Correct Answer:
10. A logic circuit with an output
consists of ________.
Options
A. two AND gates, two OR gates, two inverters
B. three AND gates, two OR gates, one inverter
C. two AND gates, one OR gate, two inverters
D. two AND gates, one OR gate
Show Answer
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Discuss
Correct Answer: two AND gates, one OR gate, two inverters
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