logo

CuriousTab

CuriousTab

Discussion


Home Digital Electronics Signals and Switches Comments

  • Question
  • What is the frequency of a clock waveform if the period of that waveform is
    1.25 µs?


  • Options
  • A. 8 kHz
  • B. 0.8 kHz
  • C. 0.8 MHz
  • D. 8 MHz

  • Correct Answer
  • 0.8 MHz 


  • Signals and Switches problems


    Search Results


    • 1. What is the advantage of using CMOS logic over TTL?

    • Options
    • A. It switches faster.
    • B. It uses less power.
    • C. It is larger.
    • D. cost
    • Discuss
    • 2. What is used to graphically show the time relationship between two or more digital waveforms?

    • Options
    • A. reference diagram
    • B. timing diagram
    • C. voltage curve
    • D. load line
    • Discuss
    • 3. Why does the TTL family use a totem-pole circuit on the output?

    • Options
    • A. It provides active pull-up.
    • B. It provides active pull-down.
    • C. It provides active pull-up and active pull-down.
    • Discuss
    • 4. An indication of cutoff in an NPN bipolar transistor is that the:

    • Options
    • A. collector current is maximum
    • B. collector-to-emitter voltage equals zero
    • C. base-to-emitter voltage equals 0.7 V
    • D. collector to emitter appears to be open
    • Discuss
    • 5. Why is parallel data transmission preferred over serial data transmission for most applications?

    • Options
    • A. It is much slower.
    • B. It is cheaper.
    • C. More people use it.
    • D. It is much faster.
    • Discuss
    • 6. What can a relay provide between the triggering source and the output that semiconductor switching devices cannot?

    • Options
    • A. total isolation
    • B. faster
    • C. higher current rating
    • D. total isolation and higher current rating
    • Discuss
    • 7. If the input voltage on D1 in the given figure is changed to 0 V, what is the output voltage Vout?


    • Options
    • A. ?5 V
    • B. 0 V
    • C. +5 V
    • D. +4.3 V
    • Discuss
    • 8. What is the advantage of using serial data transmission over parallel data transmission?

    • Options
    • A. It is slower.
    • B. Only one pair of wires is required.
    • C. More people use it.
    • D. It is faster.
    • Discuss
    • 9. The hexadecimal number 4B16 is transmitted as an 8-bit word in parallel. What is the time required for this transmission if the clock frequency is 2.25 MHz?

    • Options
    • A. 444 ns
    • B. 444 µs
    • C. 3.55 µs
    • D. 3.55 ms
    • Discuss
    • 10. Is the transistor in the given figure considered ON or OFF?


    • Options
    • A. OFF
    • B. ON
    • C. Not enough information is provided.
    • Discuss


    Comments

    There are no comments.

Enter a new Comment