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Signals and Switches problems

  • 1. What is the period of a clock waveform that has a frequency of 15.4 kHz?

  • Options
  • A. 649 µs
  • B. 6.49 µs
  • C. 64.9 µs
  • D. 0.649 µs
    • Discuss
  • 2. Determine the voltage on the collector Vc of the given transistor circuit.

    Digital Electronics Signals and Switches: Determine the voltage on the collector Vc of the given transistor circuit.


  • Options
  • A. 0 V
  • B. +10 V
  • C. +4.7 V
  • D. +0.5 V
    • Discuss
  • 3. Determine if diodes D1 and D2 in the given figure are forward or reverse biased.

    Digital Electronics Signals and Switches: Determine if diodes D1 and D2 in the given figure are forward or


  • Options
  • A. D1 forward and D2 reverse
  • B. D2 forward and D1 reverse
  • C. D1 and D2 reverse
  • D. D1 and D2 forward
    • 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. 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
  • 6. What is the output voltage Vout for the given circuit if the input voltage changes to 0 V?

    Digital Electronics Signals and Switches: What is the output voltage Vout for the given circuit if the input voltage changes


  • Options
  • A. +12 V
  • B. +15 V
  • C. +3 V
  • D. 0 V
    • Discuss
  • 7. 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
  • 8. 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
    • Discuss
  • 9. 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
  • 10. The family of logic that is composed of bipolar junction transistors is ____.

  • Options
  • A. TTL
  • B. CMOS
  • C. DIP
  • D. BJT
    • Discuss

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