VLSI DESIGN

VLSI DESIGN

ABSTRACT:

In this paper we explained about “VLSI” design with overview of “Integrated Circuit” (or) IC and it types and applications . We are given few details about

1) Size of chip & Circuit complexity.
2) Classification of IC
3) Multi-project chip & its examples, and also
4) VLSI based Electronic device.

INTRODUCTION TO VLSI:

As a result of improvements in fabrication technology, Large Scale Integrated (LSI) electronic circuitry has become so dense that a single silicon LSI chip may contain tens of thousands of transistors. Many LSI chips, such as microprocessors, now consist of multiple complex subsystems, and thus are really integrated systems rather than integrated circuits.

What we have seen so far is only the beginning. Achievable circuit density now doubles with each passing year or two. Physical principles indicate that transistors can be scaled down to less than 1/100th of their present area and still function as the sort of switching elements with which we can build digital systems. By the late 1980s it will be possible to fabricate chips containing millions of transistors. The devices and interconnections in such very large scale integrated (VLSI) systems will have linear dimensions smaller than the wavelength of visible light. New high-resolution lithographic techniques have already been demonstrated that will enable fabrication of such circuitry.

VLSI electronics presents a challenge, not only to those involved in the development of fabrication technology, but also to computer scientists and computer architects. The ways in which digital systems are structured, the procedures used to design them, the trade–offs between hardware and software, and the design of computational algorithms will all be greatly affected by the coming changes in integrated electronics. We belief this will be a major area of activity in computer science on through the 1980s.


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