VLSI Interview Questions
Questions Answers Views Company eMail

what is conductance and valence band?

1 5524

What is Fermi level?

5 9002

How does Vbe and Ic change with temperature?

Qualcomm,

2946

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

1 3554

what is Channel length modulation?

Intel,

2 5645

what is the doping?

5 6831

How does a pn junction works?

Wipro,

2 6310

What is the depletion region?

1 4759

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

1 2596

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

Analog Devices,

4 13108

What is the build-in potential?

Wipro,

1 2441

Tell me how MOSFET works.

1925

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

2 10686

How does a Bandgap Voltage reference work?

3236

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

2509


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Un-Answered Questions { VLSI }

Explain the three regions of operation of a mosfet.

619


Explain the operation considering a two processor computer system with a cache for each processor.

2341


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

710


What is Body Effect?

2031


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

709






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

2735


Explain how binary number can give a signal or convert into a digital signal?

662


How does Vbe and Ic change with temperature?

2946


For a NMOS transistor acting as a pass transistor, say the gate is connected to VDD, give the output for a square pulse input going from 0 to VDD

938


Draw the SRAM Write Circuitry

648


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

689


Give various factors on which threshold voltage depends.

747


Write a VLSI program that implements a toll booth controller?

3493


Differences between Array and Booth Multipliers?

3532


Why does the present vlsi circuits use mosfets instead of bjts?

746