Digital Electronics - Digital Signal Processing

Exercise :: Digital Signal Processing - General Questions

11. 

Which type of ADC quantizes the analog signal into a stream of bits whose amount corresponds to the signal level?

A. Successive approximation
B. Sigma-delta
C. Dual-slope
D. None of the above

Answer: Option B

Explanation:

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12. 

A binary-weighted-input digital-to-analog converter has an input resistor of 100 k. If the resistor is connected to a 5 V source, current through the resistor is ________.

A. 50 mA
B. 50 A
C. 5 mA
D. 500 A

Answer: Option B

Explanation:

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13. 

In troubleshooting a DAC, we check its performance characteristics, such as ________.

A. nonmonotonicity
B. differential nonlinearity
C. low and high gain
D. all of the above

Answer: Option D

Explanation:

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14. 

In a digital reproduction of an analog curve, accuracy can be increased by ________.

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

Answer: Option A

Explanation:

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15. 

In a 4-bit R/2R ladder digital-to-analog converter, because of negative feedback, the operational amplifier keeps the inverting (minus) input near ________.

A. 5 volts
B. zero volts
C. a voltage determined by the binary weighted input
D. none of the above

Answer: Option B

Explanation:

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