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Electronics 3 > PUT, DIAC and TRIAC > Flashcards

PUT, DIAC and TRIAC Flashcards

1
Q

is an electronic semiconductor device that can have their switching parameters set by external resistors.

A

Programmable UJT (PUT)

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2
Q

What are some most common PUTs

A

2N6027 and 2N6028

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3
Q

How many layers does a PUT have?

A

4 layers

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4
Q

What are the terminals of a PUT?

A

Anode, Cathode, Gate

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5
Q

What parameters of PUTs can be programmed?

A

intrinsic standoff ratio and peak voltage

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6
Q

The only manufacturer of PUT

A

ON Semiconductor

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7
Q

The particular level where the anode voltage is reduced to for the device to become fully saturated and no more decrease in this voltage is possible.

A

Valley Point

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8
Q

It is the anode to cathode voltage after which the PUT jumps into the negative resistance region.

A

Peak Voltage

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9
Q

What is the formula for the intrinsic standoff ratio of a PUT?

A

R1/(R1+R2)

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10
Q

Most common application of a PUT.

A

Relaxation Oscillators

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11
Q

What kind of waves are formed in a relaxation oscillator?

A

Sawtooth Waveforms

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12
Q

Is a diode that conducts electrical current only after its breakover voltage has been reached.

A

DIAC

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13
Q

What does DIAC mean?

A

Diode for Alternating Current

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14
Q

How many electrodes does a DIAC have?

A

2 electrodes

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15
Q

Main application of a DIAC

A

TRIAC triggering circuit

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16
Q

What are the terminals of a DIAC?

A

MT1, MT2

17
Q

A three terminal AC switch which is different from the other silicon controlled rectifiers in the sense that it can conduct in both directions

A

TRIAC

18
Q

What are the terminals of a TRIAC?

A

MT1, MT2, Gate

19
Q

Voltage at terminal 2 of a TRIAC is positive with respect to terminal 1 and gate voltage is also positive

A

First Quadrant Operation of TRIAC

20
Q

Voltage at terminal 2 of a TRIAC is positive with respect to terminal 1 and gate voltage is negative

A

Second Quadrant Operation of TRIAC

21
Q

Voltage of terminal 1 is positive with respect to terminal 2 and gate voltage is negative

A

Third Quadrant Operation of TRIAC

22
Q

Voltage of terminal 1 is positive with respect to terminal 2 and gate voltage is positive

A

Fourth Quadrant Operation of TRIAC

Electronics 3 (7 decks)

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