VLSI Interview Questions
Questions Answers Views Company eMail

what is conductance and valence band?

1 5528

What is Fermi level?

5 9015

How does Vbe and Ic change with temperature?

Qualcomm,

2949

If the substrate doping concentration increase, or temperature increases, how will Vt change? it increase or decrease?

1 3560

what is Channel length modulation?

Intel,

2 5653

what is the doping?

5 6850

How does a pn junction works?

Wipro,

2 6319

What is the depletion region?

1 4764

Tell me the parameters as many as possible you know that used to character an amplifier?

1 2601

What are the two types of noise of MOSFET, how to eliminate them?(Thermal and Flicker).

Analog Devices,

4 13116

What is the build-in potential?

Wipro,

1 2445

Tell me how MOSFET works.

1929

For a 0.18um and 0.8um technology MOSFET, which has a higher cutoff frequency?

2 10694

How does a Bandgap Voltage reference work?

3239

What is the ideal input and output resistance of a current source?

2513


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Un-Answered Questions { VLSI }

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

3225


Draw the SRAM Write Circuitry

651


what is verilog?

634


What are the steps required to solve setup and hold violations in vlsi?

621


Write a VLSI program that implements a toll booth controller?

3493






What types of I/O have you designed? What were their size? Speed? Configuration? Voltage requirements?

2001


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

631


What are the different measures that are required to achieve the design for better yield?

581


If an/ap = 0.5, an/ap = 1, an/ap = 3, for 3 inverters draw the transfer characteristics?

2005


Describe a finite state machine that will detect three consecutive coin tosses (of one coin) that results in heads.

2310


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

664


Explain what is scr (silicon controlled rectifier)?

613


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

574


Let A & B be two inputs of the NAND gate. Say signal A arrives at the NAND gate later than signal B. To optimize delay, of the two series NMOS inputs A & B, which one would you place near the output?

862


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

862