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VLSI Interview Questions
Questions Answers Views Company eMail

what is conductance and valence band?

1 6503

What is Fermi level?

5 10761

How does Vbe and Ic change with temperature?

Qualcomm,

3471

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

1 4562

what is Channel length modulation?

Intel,

2 7165

what is the doping?

5 8551

How does a pn junction works?

Wipro,

2 7585

What is the depletion region?

1 5616

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

1 3540

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

Analog Devices,

4 14771

What is the build-in potential?

Wipro,

1 3233

Tell me how MOSFET works.

2377

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

2 11742

How does a Bandgap Voltage reference work?

3855

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

2962


Post New VLSI Questions

Un-Answered Questions { VLSI }

Describe the various effects of scaling?

4749


Draw the timing diagram for a SRAM Read. What happens if we delay the enabling of Clock signal?

1091


Explain the operation of a 6T-SRAM cell?

4475


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

1289


Design an 8 is to 3 encoder using 4 is to encoder?

1295


How can you construct both PMOS and NMOS on a single substrate?

4939


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

3662


How logical gates are controlled by boolean logic?

1025


Cross section of a PMOS transistor?

4733


For an AND-OR implementation of a two input Mux, how do you test for Stuck-At-0 and Stuck-At-1 faults at the internal nodes? (You can expect a circuit with some redundant logic)

1236


What is Latch Up? Explain Latch Up with cross section of a CMOS Inverter. How do you avoid Latch Up?

1264


What is Body Effect?

2470


How do you size NMOS and PMOS transistors to increase the threshold voltage?

2980


Mention what are three regions of operation of mosfet and how are they used?

1033


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?

2632