Interfacing to the Analog World - General Questions (7)

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Interfacing to the Analog World - General Questions

49.

The basic approach to testing D/A converters is to:

A.	apply a sequence of binary codes covering the full range of input values to the circuit input while observing the output on an oscilloscope. The output should consist of a linear stairstep ramp.
B.	single-step the device through its full input range while checking the output with a DMM.
C.	check the output with zero input and then full input. The output of the converter should extend from zero to its maximum value. If so, then everything in between can be assumed to be operating properly.
D.	apply the correct input to the analog terminal and then check to see if the proper binary code exists on the digital inputs.

Answer: Option A

Explanation:

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50.

________ are the most linear of all the temperature transducers.

A.	Thermistors
B.	Thermocouples
C.	IC temperature sensors
D.	Resistance temperature detectors

Answer: Option C

Explanation:

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51.

Two principal advantages of the dual-slope ADC are its:

A.	high speed and low cost.
B.	high sensitivity to noise and low cost.
C.	low sensitivity to noise and high speed.
D.	low sensitivity to noise and low cost.

Answer: Option D

Explanation:

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52.

Describe offset error for a DAC.

A.	missing codes
B.	error in the slope of the output staircase waveform
C.	more or less input voltage is required for the first step than what is specified

Answer: Option C

Explanation:

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53.

What is the output voltage of the given circuit if the inputs are as follows:
2⁰ = 1, 2¹ = 1, 2² = 0, 2³ = 0?

mcq15_1010_1

A.	â€“3.115 volts
B.	â€“2.8025 volts
C.	â€“1.875 volts
D.	â€“1.24 volts

Answer: Option C

Explanation:

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54.

The process by which a computer acquires digitized analog data is referred to as ________.

A.	data acquisition
B.	monotonicity
C.	analog resolution
D.	systematic digital conversion

Answer: Option A

Explanation:

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55.

If the range of output voltage of a 6-bit DAC is 0 to 15 volts, what is the step voltage of the output?

A.	0.117 volt/step
B.	0.234 volt/step
C.	2.13 volts/step
D.	4.26 volts/step

Answer: Option B

Explanation:

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56.

One disadvantage of the tracking A/D converter is:

A.	that it requires two countersâ€”one for up and one for down.
B.	that the binary output will oscillate between two binary states when the analog input is constant.
C.	the need for an accurate clock reference for the counter.
D.	the need for a latch and its associated control circuit.

Answer: Option B

Explanation:

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Interfacing to the Analog World - General Questions (7)

Interfacing to the Analog World - General Questions

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