VLSI Interview Questions
Questions Answers Views Company eMail

what is conductance and valence band?

1 5553

What is Fermi level?

5 9073

How does Vbe and Ic change with temperature?

Qualcomm,

2961

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

1 3583

what is Channel length modulation?

Intel,

2 5696

what is the doping?

5 6910

How does a pn junction works?

Wipro,

2 6345

What is the depletion region?

1 4787

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

1 2630

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

Analog Devices,

4 13174

What is the build-in potential?

Wipro,

1 2466

Tell me how MOSFET works.

1942

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

2 10746

How does a Bandgap Voltage reference work?

3253

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

2524


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Un-Answered Questions { VLSI }

Let A & B be two inputs of the NAND gate. Say signal A arrives at the NAND gate later than signal B. To optimize delay, of the two series NMOS inputs A & B, which one would you place near the output?

888


Explain what is scr (silicon controlled rectifier)?

625


Explain how MOSFET works?

2810


Explain Cross section of a PMOS transistor?

752


Draw the Layout of an Inverter?

2054






Explain the Various steps in Synthesis?

2837


what is verilog?

641


In the design of a large inverter, why do we prefer to connect small transistors in parallel (thus increasing effective width) rather than lay out one transistor with large width?

690


What is look up table in vlsi?

552


What are the different measures that are required to achieve the design for better yield?

595


Explain about 6-T XOR gate?

741


Explain why present VLSI circuits use MOSFETs instead of BJTs?

653


How can you model a SRAM at RTL Level?

5266


what is multiplexer?

669


Why does the present vlsi circuits use mosfets instead of bjts?

759