Question 1

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

Accepted Answer

A)  lower 
B)  higher 
A)  lower 
B)  higher A

Question 2

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

Accepted Answer

A)  Fixed negative 
B)  Adjustable 
C)  Variable polarity 
D)  Dual-tracking 
A)  Fixed negative 
B)  Adjustable 
C)  Variable polarity 
D)  Dual-tracking C

Question 3

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

Question 4

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

Question 5

-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 transistor 
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 transistor

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 Vdc 
A)  27 Vdc 
B)  9 Vdc 
C)  6 Vdc 
D)  12 Vdc

Question 7

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 B 
A)  Regulator A 
B)  Regulator B

Question 8

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. 
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.

Question 9

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. 
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.

Question 10

-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 feedback 
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 feedback

Question 11

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

Question 12

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 elimination 
A)  ripple attenuation 
B)  ripple reduction 
C)  ripple rejection 
D)  ripple elimination

Question 13

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

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

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

Question 16

-Q1 in Figure is called a transistor.

Accepted Answer

A)  pass 
B)  line 
C)  series 
D)  regulator 
A)  pass 
B)  line 
C)  series 
D)  regulator

Question 17

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. 
A)  its input voltage. 
B)  its output voltage demand. 
C)  its load current demand. 
D)  its load current demand and/or its input voltage.

Question 18

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 regulation 
A)  Regulation 
B)  Line regulation 
C)  Load regulation 
D)  Series regulation

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. 
A)  10.7 V. 
B)  10 V. 
C)  9.3 V. 
D)  equal to the difference between Vin and the zener voltage rating.

Question 20

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

Exam 21: Discrete and Integrated Voltage Regulators

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

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

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

Which type of voltage regulator would use a crowbar?

-What is the purpose of RS?

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?

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?

The ideal line regulation rating is

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?

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

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?

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

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

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

A dual-polarity power supply would use a regulator.

-Q1 in Figure is called a transistor.

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

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

-The regulated output voltage from the circuit in Figure is

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

Fundamental Solid-State Principles

Diodes

Common Diode Applications: Basic Power Supply Circuits

Common Diode Applications: Clippers, Clampers, Voltage Multipliers, and Displays

Special Applications Diodes

Bipolar Junction Transistors

DC Biasing Circuits

Introduction to Amplifiers

Common-Emitter Amplifiers

Other BJT Amplifiers

Power Amplifiers

Field-Effect Transistors

Mosfets

Amplifier Frequency Response

Operational Amplifiers

Additional Op-Amp Applications

Tuned Amplifiers

Oscillators

Solid-State Switching Circuits

Thyristors and Optoelectronics Devices

Filters

-Q₁ in Figure is called a transistor.