Digital Electronics - Digital Concepts

Digital Electronics - Digital Concepts
31. The rise time is the time it takes a pulse to go from ________.
  • the base line to the maximum HIGH voltage
  • 10% of the pulse amplitude to the maximum HIGH voltage
  • the base line to 90% of the pulse amplitude
  • 10% of the pulse amplitude to 90% of the pulse amplitude
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32. What is an analog-to-digital converter?
  • It makes digital signals.
  • It takes analog signals and puts them in digital format.
  • It allows the use of digital signals in everyday life.
  • It stores information on a CD.
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33. A multiplexer has ________.
  • one input and several outputs
  • one input and one output
  • several inputs and several outputs
  • several inputs and one output
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34. What is the decimal value of 23 ?
  • 2
  • 4
  • 6
  • 8
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35. An encoder converts ________.
  • noncoded information into coded form
  • coded information into noncoded form
  • HIGHs to LOWs
  • LOWs to HIGHs
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36. What kind of logic device or circuit is used to store information?
  • Counter
  • Register
  • Inverter
  • Buffer
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37. PLCC packages have leads on ________.
  • one side
  • two sides
  • three sides
  • four sides
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38. What is the typical invalid voltage for a binary signal?
  • 0.7–2.8 volts
  • 0.8–3 volts
  • 0.8–2 volts
  • 0.7–2.5 volts
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39. Convert the fractional binary number 0001.0010 to decimal.
  • 1.40
  • 1.125
  • 1.20
  • 1.80
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40. Convert the fractional binary number 10010.0100 to decimal.
  • 24.50
  • 18.25
  • 18.40
  • 16.25
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Digital Electronics
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