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 13434

Give the expression for calculating Delay in CMOS circuit?

Infosys,

1 7523

what is charge sharing?

Intel,

2317

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

Infosys,

2 16079

Explain the working of differential sense amplifier?

1 6451

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

Infosys,

3272

What?s the critical path in a SRAM?

Infosys, Intel, Texas,

2 11534

What happens if we delay the enabling of Clock signal?

2305

What?s the difference between Testing & Verification?

Infosys,

6 30313

How can you model a SRAM at RTL Level?

Infosys,

5695

what is Latch up?How to avoid Latch up?

3 24560

What happens if we delay the enabling of Clock signal?

4 7107

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

4668

Explain why & how a MOSFET works?

Infosys,

2 6986

Explain the various MOSFET Capacitances & their significance?

1 23336

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Un-Answered Questions { VLSI }

Are you familiar with the term MESI?

2651

Explain various adders and difference between them?

1163

6-T XOR gate?

4194

How logical gates are controlled by boolean logic?

1025

Explain Cross section of a PMOS transistor?

1170

Explain how logical gates are controlled by Boolean logic?

1130

What are the different ways in which antenna violation can be prevented?

1080

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

2962

Differences between IRSIM and SPICE?

5396

Explain the Working of a 2-stage OPAMP?

1149

Why do we gradually increase the size of inverters in buffer design? Why not give the output of a circuit to one large inverter?

1246

Draw Vds-Ids curve for a MOSFET. Now, show how this curve changes with increasing Vgs.

1063

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

1155

What are the main issues associated with multiprocessor caches and how might you solve them?

2169

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

1321

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