VLSI Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

VLSI Interview Questions

Questions Answers Views Company eMail

Why is Extraction performed?

Intel,

1 7901

What is LVS, DRC?

IBM, Intel,

10 61393

Who provides the DRC rules?

Intel,

5 12048

What is validation?

Intel,

2 14162

What is Cross Talk?

Intel,

4 12576

Different ways of implementing a comparator?

Intel,

1 6479

What r the phenomenon which come into play when the devices are scaled to the sub-micron lengths?

Intel,

4 8674

What is clock feed through?

Intel,

2 17489

Implement an Inverter using a single transistor?

Intel,

4 13311

What is Fowler-Nordheim Tunneling?

Intel,

2 8200

Insights of a Tri-state inverter?

Intel,

1 5451

If an/ap = 0.5, an/ap = 1, an/ap = 3, for 3 inverters draw the transfer characteristics?

Intel,

2502

Differences between Array and Booth Multipliers?

Intel,

4081

Explain the concept of a Clock Divider Circuit? Write a VHDL code for the same?

Intel,

3 18607

Which gate is normally preferred while implementing circuits using CMOS logic, NAND or NOR? Why?

Intel,

13 37453

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Un-Answered Questions { VLSI }

Explain what is multiplexer?

1083

What products have you designed which have entered high volume production?

2448

Give the logic expression for an AOI gate. Draw its transistor level equivalent. Draw its stick diagram

1485

Explain Cross section of a PMOS transistor?

1234

For CMOS logic, give the various techniques you know to minimize power consumption

1410

Insights of a 4bit adder/Sub Circuit?

3374

Explain how Verilog is different to normal programming language?

1279

Draw a 6-T SRAM Cell and explain the Read and Write operations

1289

What work have you done on full chip Clock and Power distribution? What process technology and budgets were used?

2891

What types of CMOS memories have you designed? What were their size? Speed?

4662

What is the ideal input and output resistance of a current source?

3015

What is the difference between nmos and pmos technologies?

1115

What are the different measures that are required to achieve the design for better yield?

1218

Explain what is scr (silicon controlled rectifier)?

1064

What is the purpose of having depletion mode device?

1053

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