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 13620

Give the expression for calculating Delay in CMOS circuit?

Infosys,

1 7670

what is charge sharing?

Intel,

2438

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

Infosys,

2 16324

Explain the working of differential sense amplifier?

1 6630

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

Infosys,

3352

What?s the critical path in a SRAM?

Infosys, Intel, Texas,

2 11811

What happens if we delay the enabling of Clock signal?

2428

What?s the difference between Testing & Verification?

Infosys,

6 30842

How can you model a SRAM at RTL Level?

Infosys,

5782

what is Latch up?How to avoid Latch up?

3 24877

What happens if we delay the enabling of Clock signal?

4 7399

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

4779

Explain why & how a MOSFET works?

Infosys,

2 7246

Explain the various MOSFET Capacitances & their significance?

1 23555

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Un-Answered Questions { VLSI }

You have a driver that drives a long signal & connects to an input device. At the input device there is either overshoot, undershoot or signal threshold violations, what can be done to correct this problem?

2721

How can you construct both PMOS and NMOS on a single substrate?

5037

What is Noise Margin? Explain the procedure to determine Noise Margin?

2509

What are the various regions of operation of mosfet? How are those regions used?

1182

Write a program to explain the comparator?

1192

In vlsi chip 1000s of transistors are dropped, specifically categorized. Which method is used to achieve this & how it is done practically?

1055

What are the different classification of the timing control?

1165

How can you model a SRAM at RTL Level?

5782

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

4488

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

1341

Explain what is the use of defpararm?

1192

What is the purpose of having depletion mode device?

1101

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

1158

Basic Stuff related to Perl?

2867

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

1336

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