Question 1

The capacitance of a varactor varies

Accepted Answer

A)  inversely with the width of its depletion layer. 
B)  directly with the width of its depletion layer. 
A)  inversely with the width of its depletion layer. 
B)  directly with the width of its depletion layer. A

Question 2

The tunnel diode can be used as the active device in a

Accepted Answer

A)  constant resistance amplifier. 
B)  negative resistance oscillator. 
C)  negative current rectifier. 
D)  negative resistance linear amplifier. 
A)  constant resistance amplifier. 
B)  negative resistance oscillator. 
C)  negative current rectifier. 
D)  negative resistance linear amplifier. B

Question 3

A series current regulator is used to

Accepted Answer

A)  provide a constant input current to a load over a wide range of input voltages. 
B)  provide a load with an input current that equals the difference between the source current and the regulator current. 
A)  provide a constant input current to a load over a wide range of input voltages. 
B)  provide a load with an input current that equals the difference between the source current and the regulator current. A

Question 4

Constant-current diodes have

Accepted Answer

A)  extremely low internal impedance values. 
B)  extremely high breakdown current ratings. 
C)  extremely high internal impedance values. 
D)  extremely low breakdown voltage ratings. 
A)  extremely low internal impedance values. 
B)  extremely high breakdown current ratings. 
C)  extremely high internal impedance values. 
D)  extremely low breakdown voltage ratings.

Question 5

A tunnel diode has the following values: IP = 10 mA at VP = 250 mV and IV = 200 μA at VV = 480 mV
Calculate the dynamic resistance of the component.

Accepted Answer

A)  -2.4 kΩ to -25 Ω 
B)  -23.5 Ω 
C)  +23.5 Ω 
D)  25 Ω to 2.4 kΩ 
A)  -2.4 kΩ to -25 Ω 
B)  -23.5 Ω 
C)  +23.5 Ω 
D)  25 Ω to 2.4 kΩ

Question 6

When forward biased, the PIN diode acts as a

Accepted Answer

A)  current-controlled resistance. 
B)  current-controlled capacitance. 
C)  voltage-controlled resistance. 
D)  voltage-controlled capacitance. 
A)  current-controlled resistance. 
B)  current-controlled capacitance. 
C)  voltage-controlled resistance. 
D)  voltage-controlled capacitance.

Question 7

The tunnel diode region of operation between VP and VV is called the

Accepted Answer

A)  constant resistance region. 
B)  constant current region. 
C)  negative resistance region. 
D)  negative current region. 
A)  constant resistance region. 
B)  constant current region. 
C)  negative resistance region. 
D)  negative current region.

Question 8

Which of the following are characteristics of an effective surge protection circuit?

Accepted Answer

A)  High power dissipation capability and rapid turn-on time 
B)  High power dissipation capability and slow turn-on time 
C)  High voltage capability and rapid turn-on time 
D)  High voltage capability and slow turn-on time 
A)  High power dissipation capability and rapid turn-on time 
B)  High power dissipation capability and slow turn-on time 
C)  High voltage capability and rapid turn-on time 
D)  High voltage capability and slow turn-on time

Question 9

A varactor with a high capacitance ratio CR) rating would be well suited for use in

Accepted Answer

A)  a fine-tuning circuit. 
B)  a course-tuning circuit. 
C)  a crystal-controlled oscillator. 
D)  any of the circuits listed here. 
A)  a fine-tuning circuit. 
B)  a course-tuning circuit. 
C)  a crystal-controlled oscillator. 
D)  any of the circuits listed here.

Question 10

The step-recovery diode is a/an

Accepted Answer

A)  high-current diode. 
B)  high-voltage diode. 
C)  high-power diode. 
D)  ultra-fast diode. 
A)  high-current diode. 
B)  high-voltage diode. 
C)  high-power diode. 
D)  ultra-fast diode.

Question 11

-Figure  shows the schematic symbol for a

Accepted Answer

A)  back to back suppressor. 
B)  constant current diode. 
C)  tunnel diode. 
D)  Schottky diode. 
A)  back to back suppressor. 
B)  constant current diode. 
C)  tunnel diode. 
D)  Schottky diode.

Question 12

A tuned amplifier contains a 2.2 mH inductor in its tank circuit, along with a varactor with the following ratings: Ct = 80 pF when Vr = 3 Vdc and CR = 3 for V = 3 Vdc to 6 Vdc. What is the resonant frequency of the circuit when VR = 3 Vdc?

Accepted Answer

A)  904.3 GHz 
B)  758.7 kHz 
C)  379.4 kHz 
D)  189.9 MHz 
A)  904.3 GHz 
B)  758.7 kHz 
C)  379.4 kHz 
D)  189.9 MHz

Question 13

-Figure shows the schematic symbol for a

Accepted Answer

A)  back to back suppressor. 
B)  constant current diode. 
C)  tunnel diode. 
D)  Schottky diode. 
A)  back to back suppressor. 
B)  constant current diode. 
C)  tunnel diode. 
D)  Schottky diode.

Question 14

The is sometimes referred to as a barrier diode, hot-carrier diode, or surface-barrier diode.

Accepted Answer

A)  Tunnel diode 
B)  PIN diode 
C)  Step recovery diode 
D)  Schottky diode 
A)  Tunnel diode 
B)  PIN diode 
C)  Step recovery diode 
D)  Schottky diode

Question 15

diodes are used in the manufacture of integrated circuit chips to decrease the propagation delay time of the internal circuits.

Accepted Answer

A)  Constant current 
B)  Step recovery 
C)  Schottky 
D)  Tunnel 
A)  Constant current 
B)  Step recovery 
C)  Schottky 
D)  Tunnel

Question 16

When reverse biased, the capacitance of a PIN diode can be varied like that of the varactor.

Accepted Answer

A) True 
 B)False

Question 17

A tuned amplifier has a 2.2 mH inductor and a varactor in its tank. The varactor has the ratings Ct = 72 pf when Vr = 3 Vdc and a Cr = 2.7 for V = 3 Vdc to 6 Vdc. What is the resonant frequency of the circuit described when VR = 6 Vdc?

Accepted Answer

A)  599.8 kHz 
B)  479.9 kHz 
C)  657 kHz 
D)  1.20 MHz 
A)  599.8 kHz 
B)  479.9 kHz 
C)  657 kHz 
D)  1.20 MHz

Question 18

The doping level of a step-recovery diode

Accepted Answer

A)  is extremely high. 
B)  is extremely low. 
C)  decreases as the distance from the junction increases. 
D)  increases as the distance from the junction increases. 
A)  is extremely high. 
B)  is extremely low. 
C)  decreases as the distance from the junction increases. 
D)  increases as the distance from the junction increases.

Question 19

Schottky diodes have extremely low

Accepted Answer

A)  VF, VRRM, and junction capacitance ratings. 
B)  IF, VRRM, and junction capacitance ratings. 
C)  VF, VK, and junction capacitance ratings. 
D)  fmax, VRRM, and VF ratings. 
A)  VF, VRRM, and junction capacitance ratings. 
B)  IF, VRRM, and junction capacitance ratings. 
C)  VF, VK, and junction capacitance ratings. 
D)  fmax, VRRM, and VF ratings.

Question 20

Back-to-back suppressors contain two components that are connected

Accepted Answer

A)  anode-to-cathode. 
B)  anode-to-anode. 
C)  cathode-to-cathode. 
D)  either anode-to-anode or cathode-to-cathode. 
A)  anode-to-cathode. 
B)  anode-to-anode. 
C)  cathode-to-cathode. 
D)  either anode-to-anode or cathode-to-cathode.

Exam 5: Special Applications Diodes

The capacitance of a varactor varies

The tunnel diode can be used as the active device in a

A series current regulator is used to

Constant-current diodes have

A tunnel diode has the following values: IP = 10 mA at VP = 250 mV and IV = 200 μA at VV = 480 mV Calculate the dynamic resistance of the component.

When forward biased, the PIN diode acts as a

The tunnel diode region of operation between VP and VV is called the

Which of the following are characteristics of an effective surge protection circuit?

A varactor with a high capacitance ratio CR) rating would be well suited for use in

The step-recovery diode is a/an

-Figure shows the schematic symbol for a

A tuned amplifier contains a 2.2 mH inductor in its tank circuit, along with a varactor with the following ratings: Ct = 80 pF when Vr = 3 Vdc and CR = 3 for V = 3 Vdc to 6 Vdc. What is the resonant frequency of the circuit when VR = 3 Vdc?

-Figure shows the schematic symbol for a

The is sometimes referred to as a barrier diode, hot-carrier diode, or surface-barrier diode.

diodes are used in the manufacture of integrated circuit chips to decrease the propagation delay time of the internal circuits.

When reverse biased, the capacitance of a PIN diode can be varied like that of the varactor.

A tuned amplifier has a 2.2 mH inductor and a varactor in its tank. The varactor has the ratings Ct = 72 pf when Vr = 3 Vdc and a Cr = 2.7 for V = 3 Vdc to 6 Vdc. What is the resonant frequency of the circuit described when VR = 6 Vdc?

The doping level of a step-recovery diode

Schottky diodes have extremely low

Back-to-back suppressors contain two components that are connected

Fundamental Solid-State Principles

Diodes

Common Diode Applications: Basic Power Supply Circuits

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

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

Discrete and Integrated Voltage Regulators

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