CHAPTER 3
SPECIAL- PURPOSE DIODES
1. Diodes that were designed to operate in reverse breakdown
Zener diode
2. A device that operates in reverse bias
photodiode
3. A zener diode operating in breakdown acts as a
Voltage regulator
4. A positive temperature means that the zener voltage
Increases with an increase in temperature on decreases with decrease in temperature.
5. A diode that always operates in reverse-bias and is doped to maximize the inherent capacitance of the depletion region is
Laser
6. When the light-emitting diode (LED) is forward-biased, __________pass the pn junction and recombine with____________ in the _________material.
Electrons, holes, p-type
7. The first visible red LEDs were produced using
GaAsp
8. The normalized output of the visible red, yellow, green and blue LED peaks at __________________ (nm) respectively.
660,590,540, and 460
9. Organic LEDs and LEDs produce light through the process of __________ and ___________ respectively.
Electrophophorescence and electroluminescence
10. An increase in the amount of light intensity produces an increase in
Reverse current
11. A diode that can be used as a variable-resistance device controlled by light intensity.
Photodiode
12. A diode that operates only with majority carriers
Schottky diode
13. A diode that takes advantage of the variable forward resistance characteristic.
PIN diode
14. No reverse leakage current
Schottky diode
15. Diode used in VHF and fast switching applications
Step- Recovery diode
16. When a PIN diode is forward-biased, it acts like a
Current-controlled variable resistance
17. If a tunnel diode is placed in series with the tank circuit and biased at the center of the negative-resistance portion of its characteristic curve, a _________ will result in the output.
Constant sinusoidal voltage
18. The tunnel diode is only used at
VHF
19. In a varactor diode, what happens to the capacitance if the reverse-bias voltage decreases
a. Increases
20. The varactor capacitance ratio is also known as
a. Tuning ratio
SPECIAL- PURPOSE DIODES
1. Diodes that were designed to operate in reverse breakdown
Zener diode
2. A device that operates in reverse bias
photodiode
3. A zener diode operating in breakdown acts as a
Voltage regulator
4. A positive temperature means that the zener voltage
Increases with an increase in temperature on decreases with decrease in temperature.
5. A diode that always operates in reverse-bias and is doped to maximize the inherent capacitance of the depletion region is
Laser
6. When the light-emitting diode (LED) is forward-biased, __________pass the pn junction and recombine with____________ in the _________material.
Electrons, holes, p-type
7. The first visible red LEDs were produced using
GaAsp
8. The normalized output of the visible red, yellow, green and blue LED peaks at __________________ (nm) respectively.
660,590,540, and 460
9. Organic LEDs and LEDs produce light through the process of __________ and ___________ respectively.
Electrophophorescence and electroluminescence
10. An increase in the amount of light intensity produces an increase in
Reverse current
11. A diode that can be used as a variable-resistance device controlled by light intensity.
Photodiode
12. A diode that operates only with majority carriers
Schottky diode
13. A diode that takes advantage of the variable forward resistance characteristic.
PIN diode
14. No reverse leakage current
Schottky diode
15. Diode used in VHF and fast switching applications
Step- Recovery diode
16. When a PIN diode is forward-biased, it acts like a
Current-controlled variable resistance
17. If a tunnel diode is placed in series with the tank circuit and biased at the center of the negative-resistance portion of its characteristic curve, a _________ will result in the output.
Constant sinusoidal voltage
18. The tunnel diode is only used at
VHF
19. In a varactor diode, what happens to the capacitance if the reverse-bias voltage decreases
a. Increases
20. The varactor capacitance ratio is also known as
a. Tuning ratio
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