Question 1

Regulator A has a line regulation rating of 4 %/V. Regulator B has a line regulation rating of 15 ppm/V. Assuming that both are rated for a 10 Vdc output voltage, which is the better regulator?

Accepted Answer

A)   Regulator A
B)   Regulator BC) A) and B)
D) undefined

Question 2

Which type of voltage regulator would use a crowbar?

Accepted Answer

A)   Series-pass regulator
B)   Shunt regulator
C)   Switching regulator
D)   None of the above.E) B) and C)
F) A) and B)

Question 3

1 in Figure is called a transistor. A)  pass B)  line C)  series D)  regulator" class="answers-bank-image d-inline" rel="preload" >

-Q1 in Figure is called a transistor.

Accepted Answer

A)   pass
B)   line
C)   series
D)   regulatorE) B) and C)
F) A) and C)

Question 4

The ability of an IC voltage regulator to attenuate any input ripple voltage is called its rating.

Accepted Answer

A)   ripple attenuation
B)   ripple reduction
C)   ripple rejection
D)   ripple eliminationE) All of the above
F) A) and B)

Question 5

Using a signal to vary the pulse width of a rectangular wave without affecting its cycle time is called .

Accepted Answer

A)   variable off-time modulation
B)   pulse width modulation
C)   power switch conduction
D)   None of the above.E) A) and D)
F) None of the above

Question 6

A switching power supply has the following values: Vin = 18 Vdc, Ton = 4 ms, and Toff = 8 ms. What is the value of Vout for the circuit?

Accepted Answer

A)   27 Vdc
B)   9 Vdc
C)   6 Vdc
D)   12 VdcE) C) and D)
F) None of the above

Question 7

is a rating that indicates the change in regulation output voltage that occurs per unit change in input voltage.

Accepted Answer

A)   Regulation
B)   Line regulation
C)   Load regulation
D)   Series regulationE) A) and B)
F) A) and C)

Question 8

The the load regulation rating of a voltage regulator, the higher the quality of the circuit.

Accepted Answer

A)   lower
B)   higherC) A) and B)
D) undefined A

Question 9

The ideal line regulation rating is

Accepted Answer

A)   extremely high.
B)   in the range of 1 μV/V to 20 μV/V.
C)   in the range of 0.1 μV/V to 1 μV/V.
D)   zero.E) A) and D)
F) A) and C)

Question 10

What type of IC voltage regulator requires both positive and negative input voltages?

Accepted Answer

A)   The fixed-negative regulator
B)   The adjustable regulator
C)   The variable polarity regulator
D)   The dual-tracking regulatorE) C) and D)
F) A) and C) D

Question 11

-Which of the following best describes the circuit in Figure?

Accepted Answer

A)   Series-pass regulator with voltage feedback
B)   Shunt regulator with voltage feedback
C)   Series-pass regulator without voltage feedback
D)   Shunt regulator without voltage feedbackE) All of the above
F) B) and C)

Question 12

Both linear and switching regulators can function as step-up regulators.

Accepted Answer

A) True 
 B)False

Question 13

A dual-polarity power supply would use a regulator.

Accepted Answer

A)   Fixed-positive regulator
B)   Fixed-negative regulator
C)   Dual-tracking regulator
D)   Both A and BE) A) and D)
F) C) and D)

Question 14

A voltage regulator has the following ratings: Vin = 10 Vdc to 15 Vdc, IL = 20 mA maximum) , and regulation = 0.01%. Which of the following statements is true?

Accepted Answer

A)   The load current demand on the regulator cannot exceed 20 mA.
B)   The rated output voltage must be some value that is less than 10 Vdc.
C)   The rated output voltage falls somewhere between 10 Vdc and 15 Vdc.
D)   As long as the input voltage remains within its rated range, Vout will equal 0.01% of Vin.E) B) and D)
F) B) and C)

Question 15

-What is the purpose of RS?

Accepted Answer

A)   It provides shorted load protection
B)   It provides biasing current for Q1
C)   It provides current for the zener diode
D)   It reduces the power dissipated by the transistorE) A) and B)
F) A) and C)

Question 16

Which of the following is not a type of IC voltage regulator?

Accepted Answer

A)   Fixed negative
B)   Adjustable
C)   Variable polarity
D)   Dual-trackingE) None of the above
F) A) and C) C

Question 17

A voltage regulator is rated for an output range of IL = 0 to 40 mA. Under no-load conditions, the output voltage from the circuit is 4 Vdc. Under full-load conditions, the output voltage from the circuit is 3.984 Vdc. What is the load regulation rating of the circuit?

Accepted Answer

A)   400 μV/mA
B)   2.5 mV/mA
C)   0.4 Ω
D)   Both 400 μV/mA and 0.4 Ω are correct.E) B) and D)
F) A) and C)

Question 18

The ideal voltage regulator maintains a constant dc output voltage despite anticipated changes in

Accepted Answer

A)   its input voltage.
B)   its output voltage demand.
C)   its load current demand.
D)   its load current demand and/or its input voltage.E) None of the above
F) All of the above

Question 19

-The regulated output voltage from the circuit in Figure  is

Accepted Answer

A)   10.7 V.
B)   10 V.
C)   9.3 V.
D)   equal to the difference between Vin and the zener voltage rating.E) None of the above
F) C) and D)

Question 20

A voltage regulator has an output that changes by 2 μV when its input changes by 10 V. The line regulation rating of the device is

Accepted Answer

A)   0.02 μV/V.
B)   50 μV/V.
C)   20 μV/V.
D)   9.998 V/V.E) A) and B)
F) C) and D)

Exam 21: Discrete and Integrated Voltage Regulators

Regulator A has a line regulation rating of 4 %/V. Regulator B has a line regulation rating of 15 ppm/V. Assuming that both are rated for a 10 Vdc output voltage, which is the better regulator?

Correct AnswerverifiedShow Answer

Which type of voltage regulator would use a crowbar?

Correct AnswerverifiedShow Answer

-Q1 in Figure is called a transistor.

Correct AnswerverifiedShow Answer

The ability of an IC voltage regulator to attenuate any input ripple voltage is called its rating.

Correct AnswerverifiedShow Answer

Using a signal to vary the pulse width of a rectangular wave without affecting its cycle time is called .

Correct AnswerverifiedShow Answer

A switching power supply has the following values: Vin = 18 Vdc, Ton = 4 ms, and Toff = 8 ms. What is the value of Vout for the circuit?

Correct AnswerverifiedShow Answer

is a rating that indicates the change in regulation output voltage that occurs per unit change in input voltage.

Correct AnswerverifiedShow Answer

The the load regulation rating of a voltage regulator, the higher the quality of the circuit.

Correct AnswerverifiedA

The ideal line regulation rating is

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What type of IC voltage regulator requires both positive and negative input voltages?

Correct AnswerverifiedD

-Which of the following best describes the circuit in Figure?

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Both linear and switching regulators can function as step-up regulators.

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A dual-polarity power supply would use a regulator.

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A voltage regulator has the following ratings: Vin = 10 Vdc to 15 Vdc, IL = 20 mA maximum) , and regulation = 0.01%. Which of the following statements is true?

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-What is the purpose of RS?

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Which of the following is not a type of IC voltage regulator?

Correct AnswerverifiedC

A voltage regulator is rated for an output range of IL = 0 to 40 mA. Under no-load conditions, the output voltage from the circuit is 4 Vdc. Under full-load conditions, the output voltage from the circuit is 3.984 Vdc. What is the load regulation rating of the circuit?

Correct AnswerverifiedShow Answer

The ideal voltage regulator maintains a constant dc output voltage despite anticipated changes in

Correct AnswerverifiedShow Answer

-The regulated output voltage from the circuit in Figure is

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A voltage regulator has an output that changes by 2 μV when its input changes by 10 V. The line regulation rating of the device is

Correct AnswerverifiedShow Answer

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-Q₁ in Figure is called a transistor.

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A

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D

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C

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