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VLSI Interview Questions
Questions Answers Views Company eMail

Explain depletion region.

201

Explain the three regions of operation of a mosfet.

208

Explain what is multiplexer?

209

Explain what is scr (silicon controlled rectifier)?

212

Explain what is slack?

237

Explain what is the use of defpararm?

236

Give the cross-sectional diagram of the cmos.

190

Give various factors on which threshold voltage depends.

224

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

259

How logical gates are controlled by boolean logic?

193

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

200

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

244

What is threshold voltage?

214

What is the difference between cmos and bipolar technologies?

186

Write a program to explain the comparator?

217


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Un-Answered Questions { VLSI }

6-T XOR gate?

3330


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

3107


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?

217


What are the different types of skews used in vlsi?

243


Explain CMOS Inverter transfer characteristics?

2923






How does the size of PMOS Pull Up transistors (for bit & bit- lines) affect SRAM's performance?

222


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

501


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?

231


What happens if we use an Inverter instead of the Differential Sense Amplifier?

2191


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

3801


How about voltage source?

1401


Explain sizing of the inverter?

3322


Explain Cross section of a PMOS transistor?

235


Explain the Various steps in Synthesis?

2455


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

224