VLSI

VLSI

VLSI stands for “Very Large Scale Integration”. This is the field which involves packing more and more logic devices into smaller and smaller areas.Thanks to VLSI, circuits that would have taken boardfuls of space can now be put into a small space few millimeters across! This has opened up a big opportunity to do things that were not possible before. VLSI circuits are everywhere … your computer, your car, your brand new state-of-the-art digital camera, the cell-phones, and what have you. All this involves a lot of expertise on many fronts within the same field, which we will look at in later sections.
VLSI has been around for a long time, there is nothing new about it … but as a side effect of advances in the world of computers, there has been a dramatic proliferation of tools that can be used to design VLSI circuits. Alongside, obeying Moore’s law, the capability of an IC has increased exponentially over the years, in terms of computation power, utilisation of available area, yield. The combined effect of these two advances is that people can now put diverse functionality into the IC’s, opening up new frontiers. Examples are embedded systems, where intelligent devices are put inside everyday objects, and ubiquitous computing where small computing devices proliferate to such an extent that even the shoes you wear may actually do something useful like monitoring your heartbeats! These two fields are kinda related, and getting into their description can easily lead to another article.

VLSI Interview Question and answer

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Analog

Abbreviation of very large-scale integration, the process of placing thousands (or hundreds of thousands) of electronic components on a single chip. Nearly all modern chips employ VLSI architectures,
Very large scale integration (VLSI) is the process of creating integrated circuits by combining thousands of transistor, resistor, capciwtorbased circuits into a single chip.
VLSI is an acronym for Very Large Scale Integrated Circuit design. It is today’s most hot feild as every-1 is interested in this field This technique is used to develop circuit’s which can have more then 10,000 transistors on a single chip, most of the microprocessors and other chips are based on this technology. It uses CMOS Technology for fabrication of transistors. The first microprocessor ( intel corporation’s 4 bit 4004 ) was based on the P-MOS technology, in P-MOS the majority carrier’s are the positive charge called HOLES. however since the number of holes are less therefore the mobility and hence the speed of operation is less. due to these drawbacks the manufacturing of chips and IC’s was switched to N-MOS, i.e where the majority carriers are the negatively charged particles called the electron’s since the number of electrons are large therefore the switching speed of transistors was increased by many folds. Technology used now is C-MOS which stands for Complementary -MOS, its properties lies in between N & P MOS hence its switching speed is greater then that of P type but less then N type. The designing of any new hardware is done by using the design-flow as shown below…
Specification
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HDL Description
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RTL Simulation
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RTL Synthysis
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Functional Gate Level Simulation
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Place & routes
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Page Layout Timing
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Simulation
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Static Time analysis
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Fabrication
The heart and brain of all the appliances, equipment, and devices which we use in our daily life are encompassed with Electronic Chips , Embedded Processor and Embedded Software. VLSI and EMBEDDED SYSTEMS market will literally explode over the next several years and has the greater chances of lucrative job opportunities around the globe.

14 thoughts on “VLSI”

  1. : how to force the vector datatype value in vhdl?

    if i force the binary value, it shows these error..,

    #error: can only force a one dimentional of character enum.

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