Electronic Devices - PNPN

Exercise :: PNPN - General Questions

21. 

This is an example of a high-isolation ________ gate.

A. OR
B. NOT
C. AND
D. NAND

Answer: Option C

Explanation:

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22. 

Which of the following devices has (have) four layers of semiconductor materials?

A. Silicon-controlled switch (SCS)
B. Gate turn-off switch (GTO)
C. Light-activated silicon-controlled rectifier (LASCR)
D. All of the above

Answer: Option D

Explanation:

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23. 

Which of the following parameters are usually provided by the manufacturer on the specification sheet for SCRs?

A. Turn-on time (ton )
B. Turn-off time (toff )
C. Junction and case temperatures (tj and tc )
D. All of the above

Answer: Option D

Explanation:

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24. 

What is the maximum current (rms) rating for commercially available LASCRs today?

A. 3 A
B. 15 A
C. 20 A
D. 25 A

Answer: Option A

Explanation:

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25. 

Which of the following areas is (are) applications of an SCS?

A. Counters
B. Pulse generators
C. Voltage sensors
D. All of the above

Answer: Option D

Explanation:

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