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VLSI Interview Questions

While using logic design, explain the various steps that r followed to obtain the desirable design in a well defined manner?

5177

Why is OOPS called OOPS? (C++)

ARM, Intel,

3804

What is a linked list? Explain the 2 fields in a linked list?

6277

Implement a 2 I/P and gate using Tran gates?

3084

Insights of a 4bit adder/Sub Circuit?

2398

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

9859

Explain various adders and diff between them?

4098

Explain the working of 4-bit Up/down Counter?

3487

A circuit has 1 input X and 2 outputs A and B. If X = HIGH for 4 clock ticks, A = 1. If X = LOW for 4 clock ticks, B = 1. Draw a state diagram for this Spec?

6922

31852

Id vs. Vds Characteristics of NMOS and PMOS transistors?

14488

Explain the operation of a 6T-SRAM cell?

3544

Differences between DRAM and SRAM?

63745

Implement a function with both ratioed and domino logic and merits and demerits of each logic?

2601

Given a circuit and asked to tell the output voltages of that circuit?

2708

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

213

What is the difference between synchronous and asynchronous reset?

173

What are the different gates where boolean logic are applicable?

187

Write a VLSI program that implements a toll booth controller?

3079

Implement a 2 I/P and gate using Tran gates?

3084

what is the difference between the TTL chips and CMOS chips?

188

If an/ap = 0.5, an/ap = 1, an/ap = 3, for 3 inverters draw the transfer characteristics?

1612

What is threshold voltage?

192

Implement F= not (AB+CD) using CMOS gates?

3077

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

482

Give various factors on which threshold voltage depends.

206

Differences between Array and Booth Multipliers?

3078

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?

1623

Why do we gradually increase the size of inverters in buffer design? Why not give the output of a circuit to one large inverter?

235

Describe a finite state machine that will detect three consecutive coin tosses (of one coin) that results in heads.

1819