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Analog And Digital Converters Online Exam Quiz

Important questions about Analog And Digital Converters. Analog And Digital Converters MCQ questions with answers. Analog And Digital Converters exam questions and answers for students and interviews.

1. Which is not an analog-to-digital (ADC) conversion error?

Options

A : differential nonlinearity

B : missing code

C : incorrect code

D : offset

2. Sample-and-hold circuits in analog-to digital converters (ADCs) are designed to:

Options

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

3. In a flash analog-to-digital converter, the output of each comparator is connected to an input of a:

Options

A : decoder

B : priority encoder

C : multiplexer

D : demultiplexer

4. Incorrect codes are a form of output error for a digital-to-analog converter (DAC).

Options

A : True

B : False

C :

D :

5. The key advantage of the successive approximation analog-to-digital converter (ADC) is its conversion speed.

Options

A : True

B : False

C :

D :

6. In a binary-weighted digital-to-analog converter (DAC), the values of the input resistors are chosen to be proportional to the binary weights of the corresponding input bits.

Options

A : True

B : False

C :

D :

7. A sample-and-hold circuit samples an analog value and holds it long enough for the analog-to-digital conversion to occur.

Options

A : True

B : False

C :

D :

8. The relative accuracy of a digital-to-analog converter (DAC) is determined by settling time.

Options

A : True

B : False

C :

D :

9. One way to determine the resolution of a digital-to-analog converter (DAC) is to compare the ratio of one step voltage to the maximum output voltage.

Options

A : True

B : False

C :

D :

10. The flash method of analog-to-digital conversion (ADC) uses comparators that compare reference voltages with the analog input voltage.

Options

A : True

B : False

C :

D :

1. An 8-bit digital-to-analog converter (DAC) has a resolution of 0.125 V.

Options

A : True

B : False

C :

D :

2. If we double the number of bits in our digital representation of a number from 4 to 8 bits, we double the relative accuracy of the conversion from digital to analog.

Options

A : True

B : False

C :

D :

3. A digital-to-analog converter (DAC) is said to be nonmonotonic if the magnitude of the output voltage increases every time the input code increases.

Options

A : True

B : False

C :

D :

4. A(n) ________ converts an analog input to a digital output.

Options

A : flash converter

B : bipolar converter

C : ADC

D : DAC

5. The characteristic that a change of one binary step on the input of a digital-to-analog converter (DAC) should cause exactly one step change on the output is called ________.

Options

A : resolution

B : monotonicity

C : linearity

D : accuracy

6. ________ analog-to-digital converters (ADCs) use no clock signal, because there is no timing or sequencing required.

Options

A : Actuator

B : Dual

C : Flash

D : Bipolar

7. The problems of the binary-weighted resistor digital-to-analog converter (DAC) can be overcome by using ___________.

Options

A : an 8-bit binary-weighted resistor DAC

B : an R/2R ladder DAC

C : a staircase DAC

D : a flash DAC

8. A binary-weighted resistor used in a digital-to-analog converter (DAC) is only practical up to a resolution of ________.

Options

A : 10 bits

B : 2 bits

C : 8 bits

D : 4 bits

9. Inaccurate analog-to-digital conversion may be due to ____________.

Options

A : constant analog input voltage

B : linear ramp usage

C : intermittent counter inputs

D : faulty sample-and-hold circuitry

10. ________ analog-to-digital converters (ADCs) have a fixed value of conversion time that is not dependent on the value of the analog input.

Options

A : Substandard

B : Dual

C : Recessive approximation

D : Successive approximation

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