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

VLSI Interview Questions

Questions Answers Views Company eMail

If not into production, how far did you follow the design and why did not you see it into production?

Intel,

2148

Insights of an inverter. Explain the working?

Intel,

1 10408

Insights of a 2 input NOR gate. Explain the working?

Infosys, Intel,

1 3736

Insights of a 2 input NAND gate. Explain the working?

Intel,

1 9053

Implement F= not (AB+CD) using CMOS gates?

Intel,

1 6124

Insights of a pass gate. Explain the working?

Intel,

5030

Why do we need both PMOS and NMOS transistors to implement a pass gate?

INEL, Intel,

3 14826

What does the above code synthesize to?

Intel,

2660

Cross section of a PMOS transistor?

Intel,

4816

Cross section of an NMOS transistor?

Intel,

3 10071

What is a D-latch? Write the VHDL Code for it?

Intel,

3 22755

Differences between D-Latch and D flip-flop?

AIT, Intel, Sibridge Technologies,

17 65915

Implement D flip-flop with a couple of latches? Write a VHDL Code for a D flip-flop?

Intel,

6 20819

What is latchup? Explain the methods used to prevent it?

Intel,

2 9759

What is charge sharing?

Cypress Semiconductor, Intel,

2 13632

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Un-Answered Questions { VLSI }

What is the purpose of having depletion mode device?

1101

Design an 8 is to 3 encoder using 4 is to encoder?

1376

Explain how logical gates are controlled by Boolean logic?

1236

What work have you done on full chip Clock and Power distribution? What process technology and budgets were used?

2934

What is the function of enhancement mode transistor?

1176

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

1147

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

1316

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

1550

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

1344

Explain what is Verilog?

1155

What transistor level design tools are you proficient with? What types of designs were they used on?

5107

What does it mean “the channel is pinched off”?

1399

Implement a function with both ratioed and domino logic and merits and demerits of each logic?

3846

What are the Advantages and disadvantages of Mealy and Moore?

1344

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

4488

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