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Home ‣ Digital Electronics ‣ Interfacing to the Analog World Comments
  • Question

  • A counter-ramp ADC stops counting when ________.


  • Options
  • A. the input voltage equals the DAC staircase voltage
  • B. the counter reaches a maximum count
  • C. the input voltage equals 5 volts
  • D. the DAC staircase voltage equals 5 volts

  • Correct Answer
  • the input voltage equals the DAC staircase voltage 

    • Interfacing to the Analog World problems

    Search Results

    • 1. A counter-ramp ADC uses a comparator to compare the input voltage with ________.

    • Options
    • A. a binary number
    • B. the output of a counter
    • C. the output of a DAC
    • D. a voltage divider network
      • Discuss
    • 2. The circuit shown below is a(n) ________.


    • Options
    • A. R/2R ladder D/A converter
    • B. four-bit decoder
    • C. binary-weighted-input DAC
    • D. four-bit A/D converter
      • Discuss
    • 3. ________ ADCs use no clock signal, because there is no timing or sequencing required.

    • Options
    • A. Actuator
    • B. Dual
    • C. Flash
    • D. Bipolar
      • Discuss
    • 4. On a binary-weighted D/A converter the least significant binary input ________.

    • Options
    • A. connects to the smallest resistor
    • B. supplies the least voltage
    • C. connects to a 1 kΩ resistor
    • D. connects to the largest resistor
      • Discuss
    • 5. The characteristic that a change of one binary step on the input of a DAC should cause exactly one step change on the output is called ________.

    • Options
    • A. resolution
    • B. linearity
    • C. monotonicity
    • D. accuracy
      • Discuss
    • 6. The main advantage of the tracking A/D converter over the stairstep-ramp A/D converter is that ________.

    • Options
    • A. it does not require a counter
    • B. it uses an up/down counter to indicate the polarity of the input voltage
    • C. it uses an up/down counter to measure both positive and negative voltages
    • D. it is faster
      • Discuss
    • 7. The circuit shown below is a(n) ________.


    • Options
    • A. R/2R ladder D/A converter
    • B. four-bit decoder
    • C. binary-weighted-input DAC
    • D. four-bit A/D converter
      • Discuss
    • 8. The number of binary bits at the input of a DAC or the output of an ADC is known as ________.

    • Options
    • A. accuracy
    • B. linearity
    • C. resolution
    • D. monotonicity
      • Discuss
    • 9. The output of the circuit in the given figure (a) at point X on figure (b) will be ________.


    • Options
    • A. 1.011 V
    • B. 2.75 V
    • C. ?1.011 V
    • D. ?2.75 V
      • Discuss
    • 10. ________ ADCs have a fixed value of conversion time that is not dependent on the value of the analog input.

    • Options
    • A. Substandard
    • B. Dual
    • C. Recessive-approximation
    • D. Successive-approximation
      • Discuss

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