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 7890

What is LVS, DRC?

IBM, Intel,

10 61332

Who provides the DRC rules?

Intel,

5 12034

What is validation?

Intel,

2 14144

What is Cross Talk?

Intel,

4 12552

Different ways of implementing a comparator?

Intel,

1 6469

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

Intel,

4 8649

What is clock feed through?

Intel,

2 17467

Implement an Inverter using a single transistor?

Intel,

4 13274

What is Fowler-Nordheim Tunneling?

Intel,

2 8183

Insights of a Tri-state inverter?

Intel,

1 5441

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

Intel,

2500

Differences between Array and Booth Multipliers?

Intel,

4075

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

Intel,

3 18588

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

Intel,

13 37410

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Un-Answered Questions { VLSI }

Working of a 2-stage OPAMP?

3183

What is the main function of metastability in vsdl?

1065

What is the function of tie-high and tie-low cells?

1085

Draw the Differential Sense Amplifier and explain its working. Any idea how to size this circuit? (Consider Channel Length Modulation)

1368

Differences between Array and Booth Multipliers?

4075

For a single computer processor computer system, what is the purpose of a processor cache and describe its operation?

2393

Explain what is the use of defpararm?

1148

What are the different design constraints occur in the synthesis phase?

1101

How to improve these parameters? (Cascode topology, use long channel transistors)

2182

Implement a 2 I/P and gate using Tran gates?

4007

Draw the SRAM Write Circuitry

1186

why is the number of gate inputs to CMOS gates usually limited to four?

1337

Explain the working of 4-bit Up/down Counter?

4433

Give a big picture of the entire SRAM Layout showing your placements of SRAM Cells, Row Decoders, Column Decoders, Read Circuit, Write Circuit and Buffers

1105

Explain Cross section of an NMOS transistor?

1028

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