analog-and-digital-converters electronics question and answers -Page 2

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Analog and Digital Converters problems

1. Which is not an analog-to-digital (ADC) conversion error?
Options
A. differential nonlinearity
B. missing code
C. incorrect code
D. offset

Discuss

Correct Answer: differential nonlinearity

2. 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

Discuss

Correct Answer: stabilize the input analog signal during the conversion process

3. 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

Correct Answer: priority encoder

4. Incorrect codes are a form of output error for a digital-to-analog converter (DAC).
Options
A. True
B. False

Discuss

Correct Answer: False

5. The key advantage of the successive approximation analog-to-digital converter (ADC) is its conversion speed.
Options
A. True
B. False

Discuss

Correct Answer: True

6. In a binary-weighted digital-to-analog converter (DAC), the values of the input resistors are chosen to be proportional to the binary weights of the corresponding input bits.
Options
A. True
B. False

Discuss

Correct Answer: False

7. A sample-and-hold circuit samples an analog value and holds it long enough for the analog-to-digital conversion to occur.
Options
A. True
B. False

Discuss

Correct Answer: True

8. The relative accuracy of a digital-to-analog converter (DAC) is determined by settling time.
Options
A. True
B. False

Discuss

Correct Answer: False

9. One way to determine the resolution of a digital-to-analog converter (DAC) is to compare the ratio of one step voltage to the maximum output voltage.
Options
A. True
B. False

Discuss

Correct Answer: True

10. The flash method of analog-to-digital conversion (ADC) uses comparators that compare reference voltages with the analog input voltage.
Options
A. True
B. False

Discuss

Correct Answer: True

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