Interfacing to the Analog World - General Questions

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Interfacing to the Analog World - General Questions

An actuator is usually a device that:

A.	converts analog data to meaningful digital data.
B.	controls a physical variable.
C.	stores digital data and then processes that data according to a set of specified instructions.
D.	converts a physical variable to an electrical variable.

Answer: Option B

Explanation:

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What is gain error in 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 B

Explanation:

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What is the resolution of a D/A converter

A.	It is the reciprocal of the number of discrete steps in the D/A output.
B.	It is the comparison between the actual output of the converter and its expected output.
C.	It is the deviation between the ideal straight-line output and the actual output of the converter.
D.	It is the converter's ability to resolve between forward and reverse steps when sequenced over its entire range of inputs.

Answer: Option A

Explanation:

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Why is a binary-weighted DAC usually limited to 4-bit binary conversion?

A.	too many pins on the IC
B.	too many op amps needed
C.	too many different values of capacitors
D.	too many different values of resistors

Answer: Option D

Explanation:

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What is the main disadvantage of the counter-ramp A/D converter?

A.	It requires a counter.
B.	The counter must count up from zero at the beginning of each conversion sequence, and the conversion time will vary depending on the input voltage.
C.	It requires a precision clock in order for the conversion to be reliable.
D.	The counter must count up from zero at the beginning of each conversion sequence, and the conversion time will vary depending on the input voltage. It requires a precision clock in order for the conversion to be reliable.

Answer: Option B

Explanation:

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Sample-and-hold circuits in A/D converters are designed to:

A.	sample and hold the output of the binary counter during the conversion process
B.	stabilize the comparator's threshold voltage during the conversion process
C.	stabilize the input analog signal during the conversion process
D.	sample and hold the D/A converter staircase waveform during the conversion process

Answer: Option C

Explanation:

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Three characteristics of op amps make them almost ideal amplifiers: very high input impedance, very low impedance, and ________.

A.	very high voltage gain
B.	unlimited bandwidth
C.	a low slew rate
D.	very high current gain

Answer: Option A

Explanation:

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What is the output voltage for the circuit shown below?

mcq15_1005_1 (2)

A.	10 V
B.	20 V
C.	30 V
D.	40 V

Answer: Option C

Explanation:

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Interfacing to the Analog World - General Questions

Interfacing to the Analog World - General Questions

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