Deck 4: Common Diode Applications: Clippers, Clampers, Voltage Multipliers, and Displays

Question 1

The dc average of the output from the circuit in Figure is approximately equal to

A) +20 V.
B) +10 V.
C) -10 V.
D) -20 V.

Answer 1

+10 V.

Question 2

The positive peak output voltage for the circuit in Figure is approximately

A) 9 V.
B) 9.7 V.
C) 8.3 V.
D) 0.7 V.

Answer 2

0.7 V.

Question 3

Assuming that D₂ in Figure is an ideal component, the circuit reference voltage is

A) +20 V.
B) +0.7 V.
C) -0.7 V.
D) -20 V.

Answer 3

-20 V.

Question 4

The circuit in is a

A) positive clipper.
B) negative clipper.
C) positive clamper.
D) negative clamper.

Question 5

Which of the following determines whether a given clamper is a positive clamper or a negative clamper?

A) The type of diode used
B) The physical orientation of the diode
C) The placement of the diode i.e., in series or shunt with the load)
D) All of the above.

Question 6

Which of the following circuits is used to eliminate some portion of a signal?

A) A clipper
B) A clamper
C) A voltage multiplier

Question 7

The output from a biased clamper has a dc reference voltage that is

A) approximately equal to the dc voltage that is applied to the diode.
B) approximately equal to 0 V.
C) dependent on the peak-to-peak value of the ac input.
D) equal to the dc average of the circuitʹs output signal.

Question 8

A clipper is also known as a/an

A) dc restorer.
B) eliminator.
C) limiter.
D) regenerator.

Question 9

The circuit in Figure is a

A) positive clipper.
B) negative clipper.
C) positive clamper.
D) negative clamper.

Question 10

The circuit in Figure is a

A) half-wave voltage doubler.
B) full-wave voltage doubler.
C) voltage tripler.
D) voltage quadrupler.

Question 11

Which of the following circuits is used to change the dc reference of a signal without changing its shape?

A) A clipper
B) A clamper
C) A voltage multiplier

Question 12

The output from the circuit in is approximately

A) 10.7 Vpp.
B) 5.7 Vpp.
C) 20 Vpp.
D) 9.3 Vpp.

Question 13

The output from the circuit in Figure is approximately

A) 10.7 Vpp.
B) 5.7 Vpp.
C) 20 Vpp.
D) 9.3 Vpp.

Question 14

The clamper works on the basis of

A) charging alternate capacitors to increase output voltage.
B) shorting out a portion of the input signal to prevent it from reaching the load.
C) switching time constants.
D) alternating dc reference voltages.

Question 15

The output from the circuit in Figure is approximately

A) 20 Vdc.
B) 30 Vdc.
C) 40 Vdc.
D) 60 Vdc.

Question 16

Which of the following circuits is commonly used to provide transient protection?

A) A clamper
B) A multiplier
C) A rectifier
D) A clipper

Question 17

The negative peak output voltage for the circuit in Figure is approximately

A) -5 V.
B) -9.7 V.
C) -8.3 V.
D) -0.7 V.

Question 18

A positive clipper performs the same basic function as a negative clamper.

Question 19

The circuit in Figure is a

A) series clipper.
B) shunt clipper.
C) series clamper.
D) shunt clamper.

Question 20

A clamper is also known as a/an

A) dc restorer.
B) eliminator.
C) limiter.
D) regenerator.

Question 21

The circuit in Figure is a

A) half-wave voltage doubler.
B) full-wave voltage doubler.
C) voltage tripler.
D) voltage quadrupler.

Question 22

D2 in Figure will be off when the output from the driving circuit is

A) 0 V.
B) +5 V.

Question 23

Which of the following is best suited for use in a hand held solar powered low power) calculator?

A) An LED display
B) An LCD display
C) Seven-segment LED display

Question 24

Refer to Figure . The circuit shown has a constant 0-V output. Which of the following is the most likely cause of the problem?

A) R_L open
B) D₁ open
C) R_S open
D) R_S shorted

Question 25

Refer to Figure . The output from the circuit is identical to the input signal. Which of the following is most likely true?

A) The circuit is functioning normally.
B) C₁ is open.
C) The load resistor is shorted.
D) The diode is open.

Question 26

Which of the following is best suited for use as a computer surge protector?

A) A voltage doubler
B) A clamper
C) A clipper
D) All the above could be used for this purpose.

Question 27

D1 in Figure will be on when the output from the driving circuit is

A) 0 V.
B) +5 V.

Question 28

A display has a single ground pin that is common to all of its LED segments.

A) common-anode
B) common-cathode
C) common-diode
D) common-segment

Question 29

Refer to Figure . The potentiometer R₁) is used to

A) prevent accidental overload of D₁.
B) provide an adjustable clipped output.
C) provide an adjustable clamped output.
D) remove negative voltage spikes.

Question 30

Refer to Figure. The positive peak voltage across the 3 kΩ resistor is

A) 0 V.
B) 0.7 V.
C) 10 V.
D) 4.7 V.

Question 31

The output voltage from the circuit in Figure is approximately

A) 15 Vdc.
B) 30 Vdc.
C) 45 Vdc.
D) 60 Vdc.

Question 32

C₃ in Figure is included to reduce the ripple in the dc output voltage.

Question 33

Refer to Figure. Assuming the forward resistance of the diode is 15 Ω, what is the charge time for the capacitor?

A) 10 S
B) 10 mS
C) 75 μS
D) 50 mS