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  • Question

  • What type of circuit is represented in the given figure, and which statement best describes its operation?

    What type of circuit is represented in the given figure, and which statement best describes its oper


  • Options
  • A. It is a tristate inverter. When the ENABLE input is HIGH, the output is effectively an open circuit?it is neither LOW nor HIGH.
  • B. It is a programmable inverter. It can be programmed to function as either an active LOW or an active HIGH inverter.
  • C. It is an active LOW buffer, which can be turned on and off by the ENABLE input.
  • D. None of the above.

  • Correct Answer
  • It is a tristate inverter. When the ENABLE input is HIGH, the output is effectively an open circuit?it is neither LOW nor HIGH. 

    • More questions

    • 1. The output pulse width for a 555 monostable circuit with R1 = 3.3 kΩ and C1 = 0.02 µF is ________.

    • Options
    • A. 7.3 µs
    • B. 73 µs
    • C. 7.3 ms
    • D. 73 ms
      • Discuss
    • 2. Which of the figures given below represents a NOR gate?


    • Options
    • A. a
    • B. b
    • C. c
    • D. d
      • Discuss
    • 3. What is one advantage to using a parallel-encoded (flash) ADC?

    • Options
    • A. less expensive
    • B. very fast conversion
    • C. less complicated circuit
      • Discuss
    • 4. For a two-input XNOR gate, with the input waveforms as shown below, which output waveform is correct?


    • Options
    • A. a
    • B. b
    • C. c
    • D. d
      • Discuss
    • 5. In a multiplexer, the data select control inputs are responsible for determining which data input is selected to be transmitted to the data output line.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. The time required to complete a conversion cycle is called conversion time.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. When more than one IC is used to provide all the addressable locations in a memory, a technique called ________ is used to identify which IC is being accessed.

    • Options
    • A. address decoding
    • B. memory refresh
    • C. data encoding
    • D. memory paging
      • Discuss
    • 8. For the SOP expression , how many 1s are in the truth table's output column?

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 5
      • Discuss
    • 9. A typical RAM will write (store data internally) whenever the Chip Select line is active and the Write Enable line is inactive.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. The TTL HIGH level source current is higher than the LOW level sinking current.

    • Options
    • A. True
    • B. False
      • Discuss

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