VLSI Interview Questions
Questions Answers Views Company eMail

what is conductance and valence band?

1 2945

What is Fermi level?

5 4399

How does Vbe and Ic change with temperature?

Qualcomm,

1675




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

1091

what is Channel length modulation?

Intel,

1381

what is the doping?

5 2919

How does a pn junction works?

Wipro,

1 3435

What is the depletion region?

1 2779




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

806

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

Analog Devices,

4 8199

What is the build-in potential?

Wipro,

835

Tell me how MOSFET works.

972

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

2 6234

How does a Bandgap Voltage reference work?

1702

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

1557


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Un-Answered Questions { VLSI }

Differences between IRSIM and SPICE?

3207


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

1944


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

3216


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

1343


Explain various adders and diff between them?

2628


what is Channel length modulation?

1381


Insights of a 4bit adder/Sub Circuit?

1769


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

809


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

680


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

2829


What products have you designed which have entered high volume production?

962


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

2259


What's the price in 1K quantity?

1287


Basic Stuff related to Perl?

1346


What happens if we delay the enabling of Clock signal?

829