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- 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
- 1. What is the main disadvantage of the stairstep-ramp A/D converter?
Options- A. The counter must count up from zero at the beginning of each conversion sequence, and the conversion time will vary depending on the input voltage.
- B. It requires a counter.
- C. It requires a precision clock in order for the conversion to be reliable.
- D. All of the above Discuss
- 2. Why is a binary-weighted DAC usually limited to 4-bit binary conversion?
Options- A. too many pins on the IC
- B. too many op amps needed
- C. too many different values of capacitors
- D. too many different values of resistors Discuss
- 3. If the range of output voltage of a 6-bit DAC is 0 to 15 volts, what is the step voltage of the output?
Options- A. 0.117 volt/step
- B. 0.234 volt/step
- C. 2.13 volts/step
- D. 4.26 volts/step Discuss
- 4. A certain digital-to-analog converter has a step size of 0.25 V and a full-scale output of 7.75 V. Determine the percent of resolution and the number of input binary bits.
Options- A. 31%, 4 bits
- B. 3.23%, 4 bits
- C. 31%, 5 bits
- D. 3.23%, 5 bits Discuss
- 5. What is the accuracy of a D/A converter?
Options- A. It is the reciprocal of the number of discrete steps in the D/A output.
- B. It is the comparison between the actual output of the converter and its expected output.
- C. It is the converter's ability to resolve between forward and reverse steps when sequenced over its entire range of inputs.
- D. It is the deviation between the ideal straight-line output and the actual output of the converter. Discuss
- 6. Which of the following characterizes an analog quantity?
Options- A. Discrete levels represent changes in a quantity.
- B. Its values follow a logarithmic response curve.
- C. It can be described with a finite number of steps.
- D. It has a continuous set of values over a given range. Discuss
- 7. When comparing the conversions from digital-to-analog and analog-to-digital, the A/D conversion is generally:
Options- A. less complicated but more time consuming than the D/A conversion.
- B. more complicated and more time consuming than the D/A conversion.
- C. less complicated and less time consuming than the D/A conversion.
- D. more complicated but less time consuming than the D/A conversion. Discuss
- 8. The greater the propagation delay, the ________.
Options- A. lower the maximum frequency
- B. higher the maximum frequency
- C. maximum frequency is unaffected
- D. minimum frequency is unaffected Discuss
- 9. An analog quantity varies from 0?7 V and is input to a 6-bit A/D converter. What analog value is represented by each step on the digital output?
Options- A. 0.111 V
- B. 1.17 V
- C. 0.109 V
- D. 0.857 V Discuss
- 10. What is the linearity of a D/A converter?
Options- A. It is the reciprocal of the number of discrete steps in the D/A output.
- B. It is the comparison between the actual output of the converter and its expected output.
- C. It is the converter's ability to resolve between forward and reverse steps when sequenced over its entire range of inputs.
- D. It is the deviation between the ideal straight-line output and the actual output of the converter. Discuss
More questions
Correct Answer: The counter must count up from zero at the beginning of each conversion sequence, and the conversion time will vary depending on the input voltage.
Correct Answer: too many different values of resistors
Correct Answer: 0.234 volt/step
Correct Answer: 3.23%, 5 bits
Correct Answer: It is the comparison between the actual output of the converter and its expected output.
Correct Answer: It has a continuous set of values over a given range.
Correct Answer: more complicated and more time consuming than the D/A conversion.
Correct Answer: lower the maximum frequency
Correct Answer: 0.111 V
Correct Answer: It is the deviation between the ideal straight-line output and the actual output of the converter.
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