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Home ‣ Digital Electronics ‣ Signals and Switches Comments
  • Question

  • A TTL totem-pole circuit is designed so that the output transistors:


  • Options
  • A. are always on together
  • B. provide phase splitting
  • C. provide voltage regulation
  • D. are never on together

  • Correct Answer
  • are never on together 

    • Signals and Switches problems

    Search Results

    • 1. With surface-mount technology (SMT), the devices should:

    • Options
    • A. utilize transistor outline connections
    • B. mount directly
    • C. have parallel connecting pins
    • D. require holes and pads
      • Discuss
    • 2. What is the output voltage Vout for the given circuit if the input voltage changes to 0 V?


    • Options
    • A. +12 V
    • B. +15 V
    • C. +3 V
    • D. 0 V
      • Discuss
    • 3. What is the minimum voltage required before a diode will allow current to flow between the cathode and the anode?

    • Options
    • A. 0.7 V
    • B. 0.07 V
    • C. 4.3 V
    • D. 0.2 V
      • Discuss
    • 4. How long will it take to serially transmit the hexadecimal number C316 if the clock frequency is 1.5 MHz?

    • Options
    • A. 4.69 ms
    • B. 4.69 µs
    • C. 5.33 ms
    • D. 5.33 µs
      • Discuss
    • 5. Determine if diodes D1 and D2 in the given figure are forward or reverse biased.


    • Options
    • A. D1 forward and D2 reverse
    • B. D2 forward and D1 reverse
    • C. D1 and D2 reverse
    • D. D1 and D2 forward
      • Discuss
    • 6. Serial communication can be sped up by:

    • Options
    • A. using silver or gold conductors instead of copper
    • B. using high-speed clock signals
    • C. adjusting the duty cycle of the binary information
    • D. using silver or gold conductors instead of copper and high-speed clock signals
      • Discuss
    • 7. The family of logic that is composed of bipolar junction transistors is ____.

    • Options
    • A. TTL
    • B. CMOS
    • C. DIP
    • D. BJT
      • Discuss
    • 8. What is a disadvantage of CMOS in place of TTL?

    • Options
    • A. It switches slower.
    • B. It uses less power.
    • C. It is smaller.
    • D. cost
      • Discuss
    • 9. Why, in most applications, are transistor switches used in place of relays?

    • Options
    • A. They consume less power.
    • B. They are faster.
    • C. They are quieter and smaller.
    • D. all of the above
      • Discuss
    • 10. If the input voltage on the base of the transistor in the given figure is changed to +10 V, what is the new voltage at the collector Vc?


    • Options
    • A. Not enough information is provided.
    • B. Vc = 10 V
    • C. Vc = 0 V
    • D. Vc = 5 V
      • Discuss

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