ECET 365 Week 2 Quiz
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1. Question : (TCO #5) Identify the step size for an 8-bit analog-to-digital converter with Vref= 2.5 VDC?
Student Answer: 10 millivolts
25 millivolts
4.9 millivolts
5 volts
Comments:
2. Question : (TCO # 5) How many steps are available with a 10-bit ADC?
Student Answer: 10
1024
512
256
Comments:
3. Question : (TCO #5) What is the cutoff frequency for a low-pass filter with a resistor R = 3000 and a capacitor C = .01 µf?
Student Answer: f = 5.3 KHz
f = 3300 Hz
f = 120 KHz
f = 6 KHz
Comments:
4. Question : (TCO #5)A band-stop filter is a filter that _____ frequencies below low-limit and above high-limit frequencies and _____ frequencies between the limits.
Student Answer: blocks; blocks
passes; blocks
blocks; passes
has; blocks
Comments:
5. Question : (TCO #5) A bridge with R1= 5.1 K, R2= 2 K, and R3= 15 K can be at null if R4is _____.
Student Answer: 10.5 K
5.88 K
588
1 K
Comments:
6. Question : (TCO #5) An instrumentation amplifier with two buffers has a feedback resistor of 100 K. The two resistors from the buffer's output to the input of the last stage OP-Amp are 1 K resistors. Voltage levels to the non-inverting buffer inputs. Voltage levels to the non-inverting buffer inputs are V1= .06 volt and V2= .02 volts. What is Voutof the instrumentation amplifier?
Student Answer: 4 Volts
20.4 Volts
3.3 Volts
15.3 Volts
Comments:
7. Question : (TCO #5) An embedded system with an 8-bit analog-to-digital converter is connected to a transducer with an output voltage of 10 millivolts. This signal is amplified by an amplifier with a gain of 25. Assume that this signal level is appropriate for the ADC input. If the reference voltage of the ADC converter is 5 volts, what will be the output of the ADC in binary form?
Student Answer: 01100110
00110011
00001101
01111011
Comments:
8. Question : (TCO #5) An 8-bit analog-to-digital converter has maximum output voltage of 2.5 VDC. What is the reference voltage to this ADC?
Student Answer: 2.5 VDC
5 VDC
1.25 VDC
None of the above
Comments:
9. Question : (TCO #5) A well-behaved analog signal with a frequency of 20 kHz is being sampled. What is the sampling frequency if frequency aliasing occurs?
Student Answer: 90 kHz
40 kHz
85 kHz
60 khz
Comments:
10. Question : (TCO #5) To model a nonlinear transducer, one can _____.
Student Answer: use empirically determined nonlinear equation
use a piecewise linear system
use a lookup table located in memory
All of the above