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Home ‣ Digital Electronics ‣ Combinational Logic Circuits Comments
  • Question

  • A pull-up resistor is a resistor used to keep a given point in a circuit HIGH when in the active state.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • Combinational Logic Circuits problems

    Search Results

    • 1. In an even-parity system, the following data will produce a parity bit = 1.
      data = 1010011

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. TTL stands for transistor-technology-logic.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. The Boolean equation results from this Karnaugh map.


    • Options
    • A. True
    • B. False
      • Discuss
    • 4. The XOR gate will produce a HIGH output if only one but not both of the inputs is HIGH.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The input at the 1, 2, 4, 8 inputs to a 4-line to 16-line decoder with active-low outputs is 1110. As a result, output line 7 is driven LOW.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. The circuit given below implements the equation, .


    • Options
    • A. True
    • B. False
      • Discuss
    • 7. A Karnaugh map will ________.

    • Options
    • A. eliminate the need for tedious Boolean simplifications
    • B. allow any circuit to be implemented with just AND and OR gates
    • C. produce the simplest sum-of-products expression
    • D. give an overall picture of how the signals flow through the logic circuit
      • Discuss
    • 8. The ________ statement evaluates the variable status.

    • Options
    • A. IF/THEN
    • B. IF/THEN/ELSE
    • C. CASE
    • D. ELSIF
      • Discuss
    • 9. The 7447A is a BCD-to-7-segment decoder with ripple blanking input and output functions. The purpose of these lines is to ________.

    • Options
    • A. turn off the display for any nonsignificant digit
    • B. turn off the display for any zero
    • C. turn off the display for leading or trailing zeros
    • D. test the display to assure all segments are operational
      • Discuss
    • 10. The correct output for this XOR truth table is ________.


    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss

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