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

VLSI Interview Questions

Questions Answers Views Company eMail

What happens to delay if we include a resistance at the output of a CMOS circuit?

Infosys,

1 13540

Give the expression for calculating Delay in CMOS circuit?

Infosys,

1 7599

what is charge sharing?

Intel,

2392

Why don?t we use just one NMOS or PMOS transistor as a transmission gate?

Infosys,

2 16233

Explain the working of differential sense amplifier?

1 6554

What happens if we use an Inverter instead of the Differential Sense Amplifier?

Infosys,

3318

What?s the critical path in a SRAM?

Infosys, Intel, Texas,

2 11692

What happens if we delay the enabling of Clock signal?

2375

What?s the difference between Testing & Verification?

Infosys,

6 30647

How can you model a SRAM at RTL Level?

Infosys,

5741

what is Latch up?How to avoid Latch up?

3 24746

What happens if we delay the enabling of Clock signal?

4 7254

Explain the Charge Sharing problem while sampling data from a Bus?

4744

Explain why & how a MOSFET works?

Infosys,

2 7145

Explain the various MOSFET Capacitances & their significance?

1 23452

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Un-Answered Questions { VLSI }

Explain what is the depletion region?

1092

Draw Vds-Ids curve for a MOSFET. Now, show how this curve changes considering Channel Length Modulation.

1213

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

1487

What are the Factors affecting Power Consumption on a chip?

1289

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

1116

What is the difference between nmos and pmos technologies?

1118

Explain Process technology? What package was used and how did you model the package/system? What parasitic effects were considered?

1089

Draw the Cross Section of an Inverter? Clearly show all the connections between M1 and poly, M1 and diffusion layers etc?

3380

what is SCR (Silicon Controlled Rectifier)?

1050

What types of I/O have you designed? What were their size? Speed? Configuration? Voltage requirements?

2450

What is the function of chain reordering?

1080

Give the cross-sectional diagram of the cmos.

1002

Basic Stuff related to Perl?

2831

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

2450

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

1514

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