# Q1: Which of the following best defines Nyquist frequency?

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

# Q2: 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

A
63%
B
64%
C
15.9%
D
1.59%

A
16
B
64
C
128
D
256

# Q5: 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

A
decoder
B
priority encoder
C
multiplexer
D
demultiplexer

# Q7: Which A/D conversion method has a fixed conversion time?

A
Single-slope analog-to-digital converter
B
Dual-slope analog-to-digital converter
C
Digital-ramp analog-to-digital converter
D
Successive-approximation analog-to-digital converter

# Q8: The ADC0804 is an example of a ________.

A
single-slope analog-to-digital converter
B
dual-slope analog-to-digital converter
C
digital-ramp analog-to-digital converter
D
successive-approximation analog-to-digital converter

A
12 V
B
120 mV
C
12 mV
D
0 V

# Q10: Which type of programming is typically used for digital signal processors?

A
Assembly language
B
Machine language
C
C
D
None of the above

A
0.6 V
B
–0.6 V
C
0.1 V
D
–0.1 V

# Q12: Settling time is normally defined as the time it takes a DAC to settle within ________.

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

# Q13: The dual-slope analog-to-digital converter finds extensive use in ________.

A
digital voltmeters
B
function generators
C
frequency counters
D
all of the above

# Q14: Which is not an A/D conversion error?

A
Differential nonlinearity
B
Missing code
C
Incorrect code
D
Offset

# Q15: For a 4-bit DAC, the least significant bit (LSB) is ________.

A
6.25% of full scale
B
0.625% of full scale
C
12% of full scale
D
1.2% of full scale

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

# Q17: An op-amp has very ________.

A
high voltage gain
B
high input impedance
C
low output impedance
D
all of the above

# Q18: 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

# Q19: 16.What is the result of taking more samples during the quantization process?

A
More errors in the analog-to-digital conversion
B
More bit requirements
C
More accurate signal representation
D
More bit requirements and more accurate signal representation

# Q20: What do we call the manipulation of an analog signal in a digital domain?

A
Analog-to-digital conversion
B
Digital-to-analog conversion
C
Digital signal processing
D
Signal filtering

# Q21: 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

# Q22: How are unwanted frequencies removed prior to digital conversion?

A
Pre-filters
B
Digital signal processing
C
Sample-and-hold circuits
D
All of the above

# Q23: Which is not an A/D conversion error?

A
Differential nonlinearity
B
Missing code
C
Incorrect code
D
Offset

# Q24: Which is a typical application of digital signal processing?

A
Noise elimination
B
Music signal processing
C
Image processing
D
All of the above

# Q25: How are unwanted frequencies removed prior to digital conversion?

A
Pre-filters
B
Digital signal processing
C
Sample-and-hold circuits
D
All of the above

# Q26: Which term applies to the maintaining of a given signal level until the next sampling?

A
Holding
B
Aliasing
C
Shannon frequency sampling
D
"Stair-stepping"

# Q27: A 4-bit R/2R ladder digital-to-analog converter uses ________.

A
one resistor value
B
two resistor values
C
three resistor values
D
four resistor values

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