VLSI Interview Questions
Questions Answers Views Company eMail

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

576

what is verilog?

634

What are the different gates where boolean logic are applicable?

590

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

1017

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

750

What is the main function of metastability in vsdl?

601

What is the function of tie-high and tie-low cells?

621

What are the different types of skews used in vlsi?

1 1252

What are the different design constraints occur in the synthesis phase?

681

What are the steps involved in preventing the metastability?

651

What are the changes that are provided to meet design power targets?

646

What are the various regions of operation of mosfet? How are those regions used?

585

Explain what is the depletion region?

622

What are the steps required to solve setup and hold violations in vlsi?

626

What are the different ways in which antenna violation can be prevented?

663


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Un-Answered Questions { VLSI }

What transistor level design tools are you proficient with? What types of designs were they used on?

4567


What is the function of enhancement mode transistor?

626


Give various factors on which threshold voltage depends.

751


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

4152


Explain the three regions of operation of a mosfet.

622






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?

2181


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

3225


How about voltage source?

1828


What products have you designed which have entered high volume production?

1961


Cross section of a PMOS transistor?

4244


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

3209


Basic Stuff related to Perl?

2401


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

3983


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?

864


Draw a 6-T SRAM Cell and explain the Read and Write operations

797