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Digital Signal Processing
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Question
If a DAC has a full-scale, or maximum, output of 12 V and accuracy of
0.1%, then the maximum error for any output voltage is ________.
Options
A. 12 V
B. 120 mV
C. 12 mV
D. 0 V
Correct Answer
12 mV
Digital Signal Processing problems
Search Results
1. The resolution of a 6-bit DAC is ________.
Options
A. 63%
B. 64%
C. 15.9%
D. 1.59%
Show Answer
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Correct Answer: 1.59%
2. 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
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Correct Answer: priority encoder
3. Settling time is normally defined as the time it takes a DAC to settle within ________.
Options
A.
1/8 LSB of its final value when a change occurs in the input code
B.
1/4 LSB of its final value when a change occurs in the input code
C.
1/2 LSB of its final value when a change occurs in the input code
D. 1 LSB of its final value when a change occurs in the input code
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Correct Answer:
1/2 LSB of its final value when a change occurs in the input code
4. Which of the following best defines Nyquist frequency?
Options
A. The frequency of resonance for the filtering circuit
B. The second harmonic
C. The lower frequency limit of sampling
D. The highest frequency component of a given analog signal
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Correct Answer: The highest frequency component of a given analog signal
5. In a digital reproduction of an analog curve, accuracy can be increased by ________.
Options
A. sampling the curve more often
B. sampling the curve less often
C. decreasing the number of bits used to represent each sampled value
D. all of the above
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Correct Answer: sampling the curve more often
6. In a 4-bit R/2R ladder digital-to-analog converter, because of negative feedback, the operational amplifier keeps the inverting (minus) input near ________.
Options
A. 5 volts
B. zero volts
C. a voltage determined by the binary weighted input
D. none of the above
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Correct Answer: zero volts
7. How are unwanted frequencies removed prior to digital conversion?
Options
A. Pre-filters
B. Digital signal processing
C. Sample-and-hold circuits
D. All of the above
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Correct Answer: Pre-filters
8. Which type of programming is typically used for digital signal processors?
Options
A. Assembly language
B. Machine language
C. C
D. None of the above
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Correct Answer: Assembly language
9. Which is not an A/D conversion error?
Options
A. Differential nonlinearity
B. Missing code
C. Incorrect code
D. Offset
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Correct Answer: Differential nonlinearity
10. Which is a typical application of digital signal processing?
Options
A. Noise elimination
B. Music signal processing
C. Image processing
D. All of the above
Show Answer
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Correct Answer: All of the above
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