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- Question
Sample-and-hold circuits in analog-to digital converters (ADCs) are designed to:
Options- A. sample and hold the output of the binary counter during the conversion process
- B. stabilize the comparator's threshold voltage during the conversion process
- C. stabilize the input analog signal during the conversion process
- D. sample and hold the D/A converter staircase waveform during the conversion process
- Correct Answer
- stabilize the input analog signal during the conversion process
- 1. Which is not an analog-to-digital (ADC) conversion error?
Options- A. differential nonlinearity
- B. missing code
- C. incorrect code
- D. offset Discuss
- 2. What is the major advantage of the R/2R ladder digital-to-analog (DAC), as compared to a binary-weighted digital-to-analog DAC converter?
Options- A. It only uses two different resistor values.
- B. It has fewer parts for the same number of inputs.
- C. Its operation is much easier to analyze.
- D. The virtual ground is eliminated and the circuit is therefore easier to understand and troubleshoot. Discuss
- 3. What is the resolution of a digital-to-analog converter (DAC)?
Options- A. It is the comparison between the actual output of the converter and its expected output.
- B. It is the deviation between the ideal straight-line output and the actual output of the converter.
- C. It is the smallest analog output change that can occur as a result of an increment in the digital input.
- D. It is its ability to resolve between forward and reverse steps when sequenced over its entire range. Discuss
- 4. The difference between analog voltage represented by two adjacent digital codes, or the analog step size, is the:
Options- A. quantization
- B. accuracy
- C. resolution
- D. monotonicity Discuss
- 5. The practical use of binary-weighted digital-to-analog converters is limited to:
Options- A. R/2R ladder D/A converters
- B. 4-bit D/A converters
- C. 8-bit D/A converters
- D. op-amp comparators Discuss
- 6. In a flash analog-to-digital converter, the output of each comparator is connected to an input of a:
Options- A. decoder
- B. priority encoder
- C. multiplexer
- D. demultiplexer Discuss
- 7. If a branch opens in a parallel circuit, the current in the remaining parallel paths will change.
Options- A. True
- B. False Discuss
- 8. The largest branch resistance in a parallel circuit carries the largest branch current.
Options- A. True
- B. False Discuss
- 9. Current divider predicts that the most current will flow in the parallel path of the most resistance.
Options- A. True
- B. False Discuss
- 10. The total resistance of a parallel circuit is always greater than the largest resistor value.
Options- A. True
- B. False Discuss
Analog and Digital Converters problems
Search Results
Correct Answer: differential nonlinearity
Correct Answer: It only uses two different resistor values.
Correct Answer: It is the smallest analog output change that can occur as a result of an increment in the digital input.
Correct Answer: resolution
Correct Answer: 4-bit D/A converters
Correct Answer: priority encoder
Correct Answer: True
Correct Answer: False
Correct Answer: False
Correct Answer: False
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