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Review For Board Exam > DIODES > Flashcards

DIODES Flashcards

1
Q

the junction diode is formed when an n-type and a p type materials are brought together.

A

-P-N JUNCTION DIODES

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2
Q

p region is connected to a conductive terminal. p region is called what?

A

-ANODE

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3
Q

n region is connected to a second conductive terminal. n region is called what?

A

-CATHODE

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4
Q

condition of the diode without any supply voltage.

A

-DIODE NO BIAS

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5
Q

the region of uncovered positive and negative ions.

A

-DEPLETION REGION

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6
Q

in the absence of an applied bias voltage, the net flow of charge in any one direction for a semiconductor diode is

A

-ZERO

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7
Q

is the condition that allows current through the pn junction.

A

-DIODE FORWARD BIAS

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8
Q

extremely small current that exists in reverse bias after the transition current dies out is caused by the minority carriers in the n and p regions.

A

-REVERSE CURRENT

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9
Q

if the external reverse bias voltage is increased to a value called the breakdown voltage, the reverse current will drastically increase.

A

-DIODE REVERSE BREAKDOWN

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10
Q

the multiplication of conduction electrons is known as the

A

-AVALANCE EFFECT

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11
Q

Vth is the required voltage across junction of the diode before forward current flow.

A

-THRESHOLD VOLTAGE

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12
Q

the magnitude of current the diode can handle without burning when forward biased.

A

-FORWARD CURRENT

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13
Q

the required voltage in order to produce forward current or the voltage drop across the diode when conducting.

A

-FORWARD VOLTAGE

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14
Q

the magnitude of current that will leak when the diodes is reversed biased, ofentimes called leakage current.

A

-REVERSE CURRENT

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15
Q

the maximum reverse voltage that can be applied before current surges.

A

-REVERSE BREAKDOWN VOLTAGE

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16
Q

the time taken by the diode to operated in the reverse condition from forward conduction.

A

-REVERSE RECOVERY TIME

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17
Q

the maximum power the diode can handle without burning.

A

-MAXIMUM POWER DISSIPATION

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18
Q

the reduction of power handling capability of the diode due to the increase of ambient temperature from room temperature.

A

-LINEAR POWER DERATING FACTOR

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19
Q

the maximum temperature the diode can operate before burning its junction.

A

-MAXIMUM JUNCTION TEMPERATURE

20
Q

diffusion capacitance or storage capacitance

A

-FORWARD BIAS CAPACITANCE

21
Q

transition capacitance or depletion region capacitance

A

-REVERSE BIAS CAPACITANCE

22
Q

diode capacitance is equivalent to an open circuit.

A

-LOW FREQUENCY

23
Q

diode capacitance is equivalent to a short circuit.

A

-HIGH FREQUENCY

24
Q

Defined as a point on the characteristic curve.

A

-DC OR STATIC RESISTANCE

25
Q

defined by a tangent line at the q point

A

-AC OR DYNAMIC RESISTANCE

26
Q

defined by a straight line between limits of operation

A

-AVERAGE AC RESISTANCE

27
Q

a silicon pn junction device that is designed for operation in the reverse-breakdown region.

A

-ZENER DIODE

28
Q

designed to operate in reverse breakdown.

A

-ZENER BREAKDOWN

29
Q

two types of reverse breakdown in a zener diode are

A

-AVALANCHE AND ZENER

30
Q

always operates in reverse bias and is doped to maximize the inherent capacitance of the depletion region.

A

-VARACTOR DIODES

31
Q

acts as a capacitor dielectric because of its nonconductive characteristics.

A

-DEPLETION REGION

32
Q

a seminconductor that emitts visible light when forward biased. produced as the electron and hole recombines and release energy.

A

-LIGHT EMITTING DIODE

33
Q

converts ac to dc

A

-RECTIFIER CIRCUITS

34
Q

process of removing 1/2 of the input signal.

A

-HALF WAVE RECTIFICATION

35
Q

uses the full 360 degree cycle of the input signal

A

-FULL WAVE RECTIFICATION

36
Q

most familiar full-wave rectifier circuit. uses four diodes.

A

-BRIDGE FULL TYPE RECTIFIER

37
Q

uses only two diodes but center tapped tranformer is required.

A

-FULL WAVE RECTIFIER WITH CENTER TAPPED TRANSFORMER

38
Q

have the ability to clipp off a portion of the input signal. usually uses one resistor and one diode.

A

-CLIPPER/CLIPPING

39
Q

TWO CATEGORIES OF CLIPPERS

A
  1. SERIES CLIPPERS
  2. PARALLEL CLIPPERS
40
Q

defined as one where the diode is in series with the load.

A

-SERIES CLIPPERS

41
Q

has the diode in a branch parallel to the load

A

-PARALLEL CLIPPERS

42
Q

can empty independent dc supply to introduce an additional shift clamping

A

-CLAMPER

43
Q

stepping-up the ouput voltage

A

-VOLTAGE MULTIPLIER

44
Q

a half-wave voltage doubler/full wave doubler

A

-VOLTAGE DOUBLER

45
Q

also called variable capacitance

A

-VARACTOR DIODE OR VARICAP DIODE

Review For Board Exam (17 decks)

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