VLSI Interview Questions
Questions Answers Views Company eMail

what is conductance and valence band?

1 5973

What is Fermi level?

5 9766

How does Vbe and Ic change with temperature?

Qualcomm,

3194

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

1 3996

what is Channel length modulation?

Intel,

2 6380

what is the doping?

5 7620

How does a pn junction works?

Wipro,

2 6895

What is the depletion region?

1 5135

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

1 3031

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

Analog Devices,

4 13935

What is the build-in potential?

Wipro,

1 2795

Tell me how MOSFET works.

2138

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

2 11285

How does a Bandgap Voltage reference work?

3513

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

2740


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Un-Answered Questions { VLSI }

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

2577


Given a layout, draw its transistor level circuit. (I was given a 3 input AND gate and a 2 input Multiplexer. You can expect any simple 2 or 3 input gates)

951


why is the number of gate inputs to CMOS gates usually limited to four?

1037


Explain what is Verilog?

851


If the current through the poly is 20nA and the contact can take a max current of 10nA how would u overcome the problem?

897


Explain about 6-T XOR gate?

945


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

2078


For f = AB+CD if B is S-a-1, what are the test vectors needed to detect the fault?

998


What happens if we delay the enabling of Clock signal?

2020


Write a program to explain the comparator?

876


Basic Stuff related to Perl?

2593


How can you model a SRAM at RTL Level?

5474


Explain Cross section of an NMOS transistor?

758


What happens if we use an Inverter instead of the Differential Sense Amplifier?

3020


How does Vbe and Ic change with temperature?

3194