VLSI Interview Questions
Questions Answers Views Company eMail

what is conductance and valence band?

1 2702

What is Fermi level?

5 4101

How does Vbe and Ic change with temperature?

Qualcomm,

1616

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

1041

what is Channel length modulation?

Intel,

1341

what is the doping?

5 2653

How does a pn junction works?

Wipro,

1 3171

What is the depletion region?

1 2513

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

774

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

Analog Devices,

4 7884

What is the build-in potential?

Wipro,

786

Tell me how MOSFET works.

928

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

2 5953

How does a Bandgap Voltage reference work?

1581

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

1501


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Un-Answered Questions { VLSI }

Implement a 2 I/P and gate using Tran gates?

2162


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

889


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

1218


How about voltage source?

825


For a single computer processor computer system, what is the purpose of a processor cache and describe its operation?

761


Explain how MOSFET works?

1779


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

860


Explain the operation of a 6T-SRAM cell?

2694


6-T XOR gate?

2511


Differences between Array and Booth Multipliers?

2220


Write a VLSI program that implements a toll booth controller?

2416


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

1235


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

2083


Tell me how MOSFET works.

928


What are the main issues associated with multiprocessor caches and how might you solve them?

634