An ADC converts an analog voltage to a digital number through the processes of sampling, quantization, and encoding.
A. True
B. False
ANSWER: A
The comparator is a 1-bit ADC.
A. True
B. False
ANSWER: A
Conversion error occurs if the voltage exceeds the minimum and maximum voltage limits
A. True
B. False
ANSWER: B
The DAC fundamentally converts finite-precision numbers into a physical quantity.
A. True
B. False
ANSWER: A
The sampling frequency is the number of samples recorded each second. A. True
B. False
ANSWER: A
A continuous signal can be reconstructed from a set of sample values providing that the number of samples per second is at least twice the highest frequency presented in the signal.
A. True
B. False
ANSWER: A
Aliases are false frequencies that appear in the output data, that are simply artifacts of the sampling process, and that do not in any manner occur in the original data.
A. True
B. False
ANSWER: A
Variability in components being measured due to manufacturing processes results in random errors.
A. True
B. False
ANSWER: A
Not being able to record an electromagnetic wave using a normal camera is an example of parameter tracking error.
A. True
B. False
ANSWER: A
The frequency response describes how ratio of the output & input changes with the input frequency.
A. True
B. False
ANSWER: A
An 8-bit converter with a full-scale voltage of 10V has a resolution of:
A. 39.1 mV
B. 41.2 mV
C. 124.6 mV
D. 79.8 mV
ANSWER: A
A binary output of 10000011 represents in decimal:
A. 255
B. 63
C. 129
D. 131
ANSWER: D
The way in which symbols are mapped onto bytes:
A. Sampling
B. Quantization
C. Encoding
D. None of the above
ANSWER: C
A 4-bit single-slope integrating ADC has an input range of 0 to 10 V. The digital output for an analog input of 4.25 is:
A. 0111
B. 1000
C. 1001
D. 1010
ANSWER: A
If the sampling frequency is 250 Hz and the ratio of folding frequency to alias frequency equals is 0.5, the alias frequency is:
A. 125 Hz
B. 62.5 Hz
C. 250 Hz
D. 500 Hz
ANSWER: B
The maximum frequency of a signal allowed to be sampled with a sampling frequency of 10 kHz without suffering from aliasing is:
A. 5 kHz
B. 20 kHz
C. 8 kHz
D. 4 kHz
ANSWER: A
A 12-bit ADC has an input range of - 10 to + 10 V. The resolution error of the converter for the analog input is:
A. 0.00244
B. 0.00224
C. 0.00422
D. 0.00488
ANSWER: D
A sine wave with a frequency of 10 Hz is sampled at a rate of 18 Hz. The alias frequency produced through the sampling process is:
A. 8 Hz
B. 10 Hz
C. 18 Hz
D. 28 Hz
ANSWER: A
A 5-kHz sine wave signal is sampled at 3 kHz. The lowest alias frequency is:
A. 1 kHz
B. 3 kHz
C. 5 kHz
D. 2 kHz
ANSWER: D
Systematic error may occur due to:
A. Calibration
B. Loading
C. Hysteresis
D. All of the above
ANSWER: D