Question 1

DSP works only on digital signals.

Accepted Answer

A) True 
 B)False

Question 2

A major application for Digital Signal Processing is in filtering and conditioning:

Accepted Answer

A)  binary numbers. 
B)  digital signals. 
C)  analog signals. 
D)  square waves. 
A)  binary numbers. 
B)  digital signals. 
C)  analog signals. 
D)  square waves.

Question 3

If a DAC has an open input, it would most probably fail the:

Accepted Answer

A)  applied quadrature test. 
B)  tPHL- tPLH test. 
C)  staircase test. 
D)  Ground- Vcc test. 
A)  applied quadrature test. 
B)  tPHL- tPLH test. 
C)  staircase test. 
D)  Ground- Vcc test.

Question 4

Suppose that a 3- digit BCD digital- to- analog converter has a full- scale output of 49.95 mA. What is the percentage resolution of the DAC?

Accepted Answer

A)  0.02% 
B)  0.20% 
C)  0.10% 
D)  0.01% 
A)  0.02% 
B)  0.20% 
C)  0.10% 
D)  0.01%

Question 5

The output of a basic four- bit input digital- to- analog converter would be capable of outputting:

Accepted Answer

A)  32 different values of voltage or current that are proportional to the input binary number. 
B)  16 different values of voltage or current that are not proportional to the input binary number. 
C)  16 different values of voltage or current that are proportional to the input binary number. 
D)  32 different values of voltage or current that are not proportional to the input binary number. 
A)  32 different values of voltage or current that are proportional to the input binary number. 
B)  16 different values of voltage or current that are not proportional to the input binary number. 
C)  16 different values of voltage or current that are proportional to the input binary number. 
D)  32 different values of voltage or current that are not proportional to the input binary number.

Question 6

A(n) 	is a device that converts a physical variable to an electrical variable.

Accepted Answer

The answer of A(n) 	is a device that converts a...

Question 7

Select the statement that best describes the input resistor values for a simple DAC using an op- amp as a summing amplifier.

Accepted Answer

A)  They are binarily weighted with the LSB resistor having the largest value and the MSB having a value equal to the feedback resistor. 
B)  They are binarily weighted with the LSB resistor having a value equal to the feedback resistor and the MSB having the highest value. 
C)  Starting with the MSB resistor, the values decrease by a factor of 4 to the LSB resistor. 
D)  Starting with the LSB resistor, the values increase by a factor of 4 to the MSB resistor. 
A)  They are binarily weighted with the LSB resistor having the largest value and the MSB having a value equal to the feedback resistor. 
B)  They are binarily weighted with the LSB resistor having a value equal to the feedback resistor and the MSB having the highest value. 
C)  Starting with the MSB resistor, the values decrease by a factor of 4 to the LSB resistor. 
D)  Starting with the LSB resistor, the values increase by a factor of 4 to the MSB resistor.

Question 8

An ADC error of 1 LSB is its resolution or 	error.

Accepted Answer

The answer of An ADC error of 1 LSB is...

Question 9

The resolution or step size of a 4- bit, or any other, digital- to- analog converter may be defined as:

Accepted Answer

A)  the value of the K proportionality factor. 
B)  the difference in the analog value from the smallest binary input and the largest binary input (in this example 00002- 11112) or as the weight of the MSB. 
C)  the difference in the analog value from the binary input 00002- 00012, or as the weight of the LSB. 
D)  Both A and C 
A)  the value of the K proportionality factor. 
B)  the difference in the analog value from the smallest binary input and the largest binary input (in this example 00002- 11112) or as the weight of the MSB. 
C)  the difference in the analog value from the binary input 00002- 00012, or as the weight of the LSB. 
D)  Both A and C

Question 10

The output from a D/A converter is true analog.

Accepted Answer

A) True 
 B)False

Question 11

The main advantages of the successive- approximation ADC over the digital- ramp ADC is its:

Accepted Answer

A)  shorter conversion time. 
B)  more complex circuitry. 
C)  longer conversion time. 
D)  less complex circuitry. 
A)  shorter conversion time. 
B)  more complex circuitry. 
C)  longer conversion time. 
D)  less complex circuitry.

Question 12

The analog voice signal from the microphone of a cell phone must be filtered in order to reduce its _ 	.

Accepted Answer

The answer of The analog voice signal from the microphone...

Question 13

The quantization error in an analog- to- digital converter can be reduced by:

Accepted Answer

A)  decreasing the number of bits in the counter and DAC. 
B)  increasing the number of bits in the counter and DAC. 
C)  decreasing the number of bits in the counter and increasing the number of bits in the DAC. 
D)  increasing the number of bits in the counter and decreasing the number of bits in the DAC. 
A)  decreasing the number of bits in the counter and DAC. 
B)  increasing the number of bits in the counter and DAC. 
C)  decreasing the number of bits in the counter and increasing the number of bits in the DAC. 
D)  increasing the number of bits in the counter and decreasing the number of bits in the DAC.

Question 14

The sampling frequency for a 10 KHz input signal should be 	samples per second.

Accepted Answer

A)  at least 10,000 
B)  at most 10,000 
C)  at least 20,000 
D)  at most 5,000 
A)  at least 10,000 
B)  at most 10,000 
C)  at least 20,000 
D)  at most 5,000

Question 15

A digital- to- analog converter has a step size of 0.25 V and a full- scale output of 7.75 V. Determine the percent of resolution and the number of input binary bits.

Accepted Answer

A)  3.23%, 5 bits 
B)  3.23%, 4 bits 
C)  31%, 4 bits 
D)  31%, 5 bits 
A)  3.23%, 5 bits 
B)  3.23%, 4 bits 
C)  31%, 4 bits 
D)  31%, 5 bits

Question 16

DACs produce both positive and negative output values.

Accepted Answer

The answer of DACs produce both positive and negative output...

Question 17

Refer to the preceding problem. The DAC that is selected would be required to have:

Accepted Answer

A)  the same number of input binary bits as the rejected DAC. 
B)  fewer input binary bits than the rejected DAC. 
C)  a greater number of input binary bits than the rejected DAC. 
D)  greater resolution per step than the rejected DAC. Resolution and the number of input binary bits have no bearing on each other in this instance. 
A)  the same number of input binary bits as the rejected DAC. 
B)  fewer input binary bits than the rejected DAC. 
C)  a greater number of input binary bits than the rejected DAC. 
D)  greater resolution per step than the rejected DAC. Resolution and the number of input binary bits have no bearing on each other in this instance.

Question 18

If the feedback resistor (Rf) in a summing op- amp is increased by a factor of four, each input weight will be decreased by a factor of four.

Accepted Answer

A) True 
 B)False

Question 19

ADCs use many comparators and are extremely fast.

Accepted Answer

The answer of ADCs use many comparators and are extremely...

Question 20

A certain digital- to- analog converter has a proportionality factor (K) of 0.6 V. Determine the input binary number if the output voltage is 5.4 V.

Accepted Answer

A)  11002  
B)  10102  
C)  10112  
D)  10012 
A)  11002  
B)  10102  
C)  10112  
D)  10012

DSP works only on digital signals.

A major application for Digital Signal Processing is in filtering and conditioning:

If a DAC has an open input, it would most probably fail the:

Suppose that a 3- digit BCD digital- to- analog converter has a full- scale output of 49.95 mA. What is the percentage resolution of the DAC?

The output of a basic four- bit input digital- to- analog converter would be capable of outputting:

A(n) is a device that converts a physical variable to an electrical variable.

Select the statement that best describes the input resistor values for a simple DAC using an op- amp as a summing amplifier.

An ADC error of 1 LSB is its resolution or error.

The resolution or step size of a 4- bit, or any other, digital- to- analog converter may be defined as:

The output from a D/A converter is true analog.

The main advantages of the successive- approximation ADC over the digital- ramp ADC is its:

The analog voice signal from the microphone of a cell phone must be filtered in order to reduce its _ .

The quantization error in an analog- to- digital converter can be reduced by:

The sampling frequency for a 10 KHz input signal should be samples per second.

A digital- to- analog converter has a step size of 0.25 V and a full- scale output of 7.75 V. Determine the percent of resolution and the number of input binary bits.

DACs produce both positive and negative output values.

Refer to the preceding problem. The DAC that is selected would be required to have:

If the feedback resistor (R_f) in a summing op- amp is increased by a factor of four, each input weight will be decreased by a factor of four.

ADCs use many comparators and are extremely fast.

A certain digital- to- analog converter has a proportionality factor (K) of 0.6 V. Determine the input binary number if the output voltage is 5.4 V.

Introductory Concepts

Number Systems and Codes

Describing Logic Circuits

Combinational Logic Circuits

Flip-Flops and Related Devices

Digital Arithmetic: Operations and Circuits

Counters and Registers

Integrated-Circuit Logic Families

MSI Logic Circuits

Digital System Projects Using HDL

Memory Devices

Programmable Logic Device Architectures

Filters

Exam 11: Interfacing With the Analog World

DSP works only on digital signals.

A major application for Digital Signal Processing is in filtering and conditioning:

If a DAC has an open input, it would most probably fail the:

Suppose that a 3- digit BCD digital- to- analog converter has a full- scale output of 49.95 mA. What is the percentage resolution of the DAC?

The output of a basic four- bit input digital- to- analog converter would be capable of outputting:

A(n) is a device that converts a physical variable to an electrical variable.

Select the statement that best describes the input resistor values for a simple DAC using an op- amp as a summing amplifier.

An ADC error of 1 LSB is its resolution or error.

The resolution or step size of a 4- bit, or any other, digital- to- analog converter may be defined as:

The output from a D/A converter is true analog.

The main advantages of the successive- approximation ADC over the digital- ramp ADC is its:

The analog voice signal from the microphone of a cell phone must be filtered in order to reduce its _ .

The quantization error in an analog- to- digital converter can be reduced by:

The sampling frequency for a 10 KHz input signal should be samples per second.

A digital- to- analog converter has a step size of 0.25 V and a full- scale output of 7.75 V. Determine the percent of resolution and the number of input binary bits.

DACs produce both positive and negative output values.

Refer to the preceding problem. The DAC that is selected would be required to have:

If the feedback resistor (Rf) in a summing op- amp is increased by a factor of four, each input weight will be decreased by a factor of four.

ADCs use many comparators and are extremely fast.

A certain digital- to- analog converter has a proportionality factor (K) of 0.6 V. Determine the input binary number if the output voltage is 5.4 V.

Introductory Concepts

Number Systems and Codes

Describing Logic Circuits

Combinational Logic Circuits

Flip-Flops and Related Devices

Digital Arithmetic: Operations and Circuits

Counters and Registers

Integrated-Circuit Logic Families

MSI Logic Circuits

Digital System Projects Using HDL

Memory Devices

Programmable Logic Device Architectures

Filters

If the feedback resistor (R_f) in a summing op- amp is increased by a factor of four, each input weight will be decreased by a factor of four.