VLSI Interview Questions
Questions Answers Views Company eMail

Explain depletion region.

615

Explain the three regions of operation of a mosfet.

622

Explain what is multiplexer?

622

Explain what is scr (silicon controlled rectifier)?

613

Explain what is slack?

638

Explain what is the use of defpararm?

653

Give the cross-sectional diagram of the cmos.

558

Give various factors on which threshold voltage depends.

751

How binary number can give a signal or convert into a digital signal?

686

How logical gates are controlled by boolean logic?

625

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

581

What does it mean “the channel is pinched off”?

845

What is threshold voltage?

679

What is the difference between cmos and bipolar technologies?

566

Write a program to explain the comparator?

675


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Un-Answered Questions { VLSI }

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)

718


Explain what is the depletion region?

622


In Verilog code what does “timescale 1 ns/ 1 ps” signifies?

693


Are you familiar with the term MESI?

2115


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

863






For a NMOS transistor acting as a pass transistor, say the gate is connected to VDD, give the output for a square pulse input going from 0 to VDD

942


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

2622


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)

710


Differences between Array and Booth Multipliers?

3537


How does Vbe and Ic change with temperature?

2951


What are the Advantages and disadvantages of Mealy and Moore?

702


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

1738


what is verilog?

634


What is the main function of metastability in vsdl?

601


Differences between IRSIM and SPICE?

4942