ECET365 Week 2 Quiz

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

Photos

ECET365 Week 2 Quiz
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