# Testing and Simulation Involved in the Circuit Design.

December 1996

## Date of Award

Winter 12-12-1997

## Institute Name (Publisher)

Indian Statistical Institute

## Document Type

Master's Dissertation

## Degree Name

Master of Technology

Computer Science

## Department

Advance Computing and Microelectronics Unit (ACMU-Kolkata)

## Supervisor

Bhattacharya, Bhargab Bikram (ACMU-Kolkata; ISI)

## Abstract (Summary of the Work)

Chapter 1Basics and Reviews1.1 VLSI Design CycleIn this chapter, we briefly review the VLSI Design Cycle. It starts with a formal specification of a VLSI chip, follows a series of steps and finally produces a packaged chip. A typical design cycle is represented in the diagram 1.1.1.1.1 System SpecificationThe first step is to formulate the specifications of the system to be designed. It will be basically a high level representation of the system. The factors to be considered are: performance, functionality and the physical dimensions. The choice of fabrication technology and design techniques are also considered here. The end results are specifications for the size, speed, power and functionality of the VLSI system to be designed.1.1.2 Functional DesignThe behavioral aspects of the system are considered here. The result is usually a timing diagram or other relationships between subunits to improve the overall design process and to reduce the complexity of the subsequent phases.1.1.3 Logic DesignHere, the logic structure that represents the functional design is derived and tested. Usually, logic design is represented by boolean expressions. This logical design of the system is simulated and tested to verify its correctness.1.1.4 Circuit DesignHere, the circuit representation based on the logic design is developed. The circuit design is usually expressed in a detailed circuit diagram. Here also, the circuit design is simulated and tested to verify its correctness and to reduce the complexity which might arise in subsequent phases.1.1.5 Physical DesignIn this step, the circuit representation of each component is converted into a geometric representation. This geometric representation of a circuit is called a layout. The physical design is a complex process, and is split up into various units like partitioning, placement, floorplanning, routing and compaction.1.1.6 Design VerificationThe layout is verified to ensure that it meets the system specifications and the fabrication requirements. Design verification consists of Design Rule Checking (DRC) and Circuit Extraction. DRC is a process which verifies that all geometric patterns meet the design rules imposed by the fabrication process. Then the functionality of the circuit is verified by circuit extrac- tion. This is a reverse engineering process and generates the circuit from the layout.1.1.7 FabricationAfter the verification, fabrication is done. This consists of preparation of wafer, deposition and diffusion of various materials on the wafer according to layout description.

## Comments

ProQuest Collection ID: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqm&rft_dat=xri:pqdiss:28843383

ISI-DISS-1996-24

## Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

## DOI

http://dspace.isical.ac.in:8080/jspui/handle/10263/6199

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