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Home Digital Electronics Logic Gates Comments

  • Question
  • The terms "low speed" and "high speed," applied to logic circuits, refer to the ________.


  • Options
  • A. rise time
  • B. fall time
  • C. propagation delay time
  • D. clock speed

  • Correct Answer
  • propagation delay time 


  • Logic Gates problems


    Search Results


    • 1. The switching speed of CMOS is now ________.

    • Options
    • A. competitive with TTL
    • B. three times that of TTL
    • C. slower than TTL
    • D. twice that of TTL
    • Discuss
    • 2. The power dissipation, PD, of a logic gate is the product of the ________.

    • Options
    • A. dc supply voltage and the peak current
    • B. dc supply voltage and the average supply current
    • C. ac supply voltage and the peak current
    • D. ac supply voltage and the average supply current
    • Discuss
    • 3. How many truth table entries are necessary for a four-input circuit?

    • Options
    • A. 4
    • B. 8
    • C. 12
    • D. 16
    • Discuss
    • 4. The basic logic gate whose output is the complement of the input is the:

    • Options
    • A. OR gate
    • B. AND gate
    • C. inverter
    • D. comparator
    • Discuss
    • 5. What is the name of a digital circuit that produces several repetitive digital waveforms?

    • Options
    • A. an inverter
    • B. an OR gate
    • C. a Johnson shift counter
    • D. an AND gate
    • Discuss
    • 6. A 2-input NOR gate is equivalent to a ________.

    • Options
    • A. negative-OR gate
    • B. negative-AND gate
    • C. negative-NAND gate
    • D. none of the above
    • Discuss
    • 7. What are the pin numbers of the outputs of the gates in a 7432 IC?

    • Options
    • A. 3, 6, 10, and 13
    • B. 1, 4, 10, and 13
    • C. 3, 6, 8, and 11
    • D. 1, 4, 8, and 11
    • Discuss
    • 8. How many AND gates are found in a 7411 IC?

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
    • Discuss
    • 9. How many pins does the 4049 IC have?

    • Options
    • A. 14
    • B. 16
    • C. 18
    • D. 20
    • Discuss
    • 10. A clock signal with a period of 1 µs is applied to the input of an enable gate. The output must contain six pulses. How long must the enable pulse be active?

    • Options
    • A. Enable must be active for 0 µs.
    • B. Enable must be active for 3 µs.
    • C. Enable must be active for 6 µs.
    • D. Enable must be active for 12 µs.
    • Discuss


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