VLSI Interview Questions
Questions Answers Views Company eMail

what is conductance and valence band?

1 2546

What is Fermi level?

5 3940

How does Vbe and Ic change with temperature?

Qualcomm,

1594

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

994

what is Channel length modulation?

Intel,

1321

what is the doping?

5 2442

How does a pn junction works?

Wipro,

1 2919

What is the depletion region?

1 2383

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

698

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

Analog Devices,

4 7680

What is the build-in potential?

Wipro,

764

Tell me how MOSFET works.

904

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

2 5685

How does a Bandgap Voltage reference work?

1524

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

1490


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Un-Answered Questions { VLSI }

You have a driver that drives a long signal & connects to an input device. At the input device there is either overshoot, undershoot or signal threshold violations, what can be done to correct this problem?

757


Write a VLSI program that implements a toll booth controller?

2397


Implement F= not (AB+CD) using CMOS gates?

2045


Basic Stuff related to Perl?

1272


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

742


How does Vbe and Ic change with temperature?

1594


What is the build-in potential?

764


Given a circuit and asked to tell the output voltages of that circuit?

961


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

2996


How does a Bandgap Voltage reference work?

1524


What was your role in the silicon evaluation or product ramp? What tools did you use?

762


What's the price in 1K quantity?

1226


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

2642


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

1657


what is Channel length modulation?

1321