VLSI Interview Questions
Questions Answers Views Company eMail

Mention what are the different gates where Boolean logic are applicable?

684

what is a sequential circuit?

616

what is the use of defpararm?

733

Explain how binary number can give a signal or convert into a digital signal?

682

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

811

what are three regions of operation of MOSFET and how are they used?

692

what is SCR (Silicon Controlled Rectifier)?

642

Explain why present VLSI circuits use MOSFETs instead of BJTs?

661

what is multiplexer?

675

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

708

Explain how Verilog is different to normal programming language?

694

Explain what is Verilog?

650

what is Slack?

717

Mention what are the two types of procedural blocks in Verilog?

778

Explain how logical gates are controlled by Boolean logic?

643


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Un-Answered Questions { VLSI }

Describe the various effects of scaling?

4329


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

1756


Help with VHDL programming. Write a VHDL code for a D-Latch with clear input ?? (Hint: Set up a “Process” with appropriate sensitivity list to get the desired D-Latch with Clr working.) Inputs AND OUTPUTS: entity Lab4b is Port ( Clr, Clk, D : in STD_LOGIC; Q : out STD_LOGIC); end Lab4b;

1073


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

3228


You have three adjacent parallel metal lines. Two out of phase signals pass through the outer two metal lines. Draw the waveforms in the centre metal line due to interference. Now, draw the signals if the signals in outer metal lines are in phase with each other

1003






Give a big picture of the entire SRAM Layout showing your placements of SRAM Cells, Row Decoders, Column Decoders, Read Circuit, Write Circuit and Buffers

652


Explain what is scr (silicon controlled rectifier)?

629


What is threshold voltage?

703


What is the difference between the mealy and moore state machine?

606


Differences between IRSIM and SPICE?

4965


Explain the working of Insights of a pass gate ?

686


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?

2205


Explain what is Verilog?

650


Explain what is slack?

655


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

960