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

VLSI Interview Questions

Questions Answers Views Company eMail

Tell me how BJT works.

2 7922

what is Early effects and their physical origin.

1 4491

what is short Channel effect.

2 7850

How about voltage source?

2209

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

2130

Explain how MOSFET works?

3193

Explain the various MOSFET Capacitances & their significance ?

Infosys,

1 7195

Explain the sizing of the inverter?

Intel,

1 8450

How do you size NMOS and PMOS transistors to increase the threshold voltage?

Infosys,

2967

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

Amkor, Cisco, Infosys, Intel,

4 34398

Give the expression for CMOS switching power dissipation?

Infosys,

2 12222

what is body effect?

1 6299

Describe the various effects of scaling?

Infosys,

4743

What happens to delay if you increase load capacitance?

Infosys,

3 18959

What are the different limitations in increasing the power supply to reduce delay?

2 8729

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Un-Answered Questions { VLSI }

Are you familiar with the term MESI?

2637

Explain various adders and difference between them?

1152

Working of a 2-stage OPAMP?

3120

Explain Cross section of a PMOS transistor?

1165

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

2392

What are the different design techniques required to create a layout for digital circuits?

994

Explain what is scr (silicon controlled rectifier)?

1017

what is a sequential circuit?

1088

what is SCR (Silicon Controlled Rectifier)?

999

In Verilog code what does “timescale 1 ns/ 1 ps” signifies?

1148

What are the steps involved in designing an optimal pad ring?

1123

Draw the SRAM Write Circuitry

1137

What is the difference between the mealy and moore state machine?

1035

Explain about 6-T XOR gate?

1179

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

1246

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