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Home ‣ Digital Electronics ‣ Describing Logic Circuits Comments
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  • VHDL is not a new language.


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    • Describing Logic Circuits problems

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    • 1. In Boolean algebra, 1 · 0 = 0.

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    • A. True
    • B. False
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    • 2. The symbol shown below is an AND gate.


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    • A. True
    • B. False
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    • 3. The NAND gate is an example of combinational logic.

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    • A. True
    • B. False
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    • 4. A NAND gate consists of an AND gate and an OR gate connected in series with each other.

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    • A. True
    • B. False
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    • 5. The timing diagram for a two-input NAND gate is shown below. The gate is working correctly.


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    • A. True
    • B. False
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    • 6. A two-input NAND gate has inputs of 1 and 0; the output is 0.

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    • A. True
    • B. False
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    • 7. The output of a NAND gate is the inverse of the output for an AND gate for all possible input combinations.

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    • A. True
    • B. False
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    • 8. The commutative law of Boolean addition states that A + B = A · B.

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    • A. True
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    • 9. Boolean algebra was first applied to the analysis of digital circuits by Claude Shannon at Stanford University.

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    • A. True
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    • 10. Output logic levels for certain input conditions of a logic circuit may often be determined without using the Boolean expression.

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    • A. True
    • B. False
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