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Infosys VLSI Interview Questions

Questions Answers Views Company eMail

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

2 13522

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

3 13614

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

1 7575

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

4135

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

1 3675

Differences between DRAM and SRAM?

14 72844

What types of high speed CMOS circuits have you designed?

2 14599

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

1116

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

1373

In the design of a large inverter, why do we prefer to connect small transistors in parallel (thus increasing effective width) rather than lay out one transistor with large width?

1198

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

1213

Draw the stick diagram of a NOR gate. Optimize it

1295

Given a layout, draw its transistor level circuit. (I was given a 3 input AND gate and a 2 input Multiplexer. You can expect any simple 2 or 3 input gates)

1206

Draw the timing diagram for a SRAM Read. What happens if we delay the enabling of Clock signal?

1135

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

1121

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Un-Answered Questions

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What is java 2 platform, micro edition (j2me)?

1082

What is the basic purpose of creating a profit center?

1043

Explain apk format for android?

930

What are the differences between web role and worker role?

122

Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

2188

wat is test management ?what are the components available in test management?

2113

What does a router.navigate do?

897

What is cross-validation?

301

which charactor can be added to the identifire mylengthyvariable, to make it more redable? : Adobe flash

831

What is a query in mysql?

998

How to write 'foreach' statement for map datatype in pig scripts?

671

What is breadth-first search algorithm?

963

What do you understand by pure virtual function? Write about its use?

1007

What is the difference between top down and bottom up approach in soap web services?

867