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

VLSI Interview Questions

Questions Answers Views Company eMail

Explain CMOS Inverter transfer characteristics?

ADS,

3868

Explain sizing of the inverter?

Infosys,

4374

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

4 29361

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

2415

Give the expression for CMOS switching power dissipation?

Cypress Semiconductor,

2 8224

What is Body Effect?

CG CoreEL, Cisco, TA,

2468

What happens to delay if you increase load capacitance?

Google,

1 3575

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

Infosys,

2 13323

How does Resistance of the metal lines vary with increasing thickness and increasing length?

Infosys,

3 13455

What happens if we increase the number of contacts or via from one metal layer to the next?

Infosys,

1 7460

Give the various techniques you know to minimize power consumption?

5 12855

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

1 4076

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

2944

What is the critical path in a SRAM?

3114

In a SRAM layout, which metal layers would you prefer for Word Lines and Bit Lines? Why?

Infosys,

4065

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Un-Answered Questions { VLSI }

What are the Advantages and disadvantages of Mealy and Moore?

1200

what is the difference between the TTL chips and CMOS chips?

1072

Explain what is scr (silicon controlled rectifier)?

1020

What types of CMOS memories have you designed? What were their size? Speed?

4608

Describe the various effects of scaling?

4747

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

1244

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

4933

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

1038

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

976

Draw the SRAM Write Circuitry

1140

what is verilog?

1059

What is look up table in vlsi?

942

Basic Stuff related to Perl?

2781

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

1281

what is the use of defpararm?

1102

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