A Phase Change Memory as a Secure Main Memory
A Seminar Report
by
Abdul Nassar A A
M105101
Department of Computer Science & Engineering
College of Engineering Trivandrum
Kerala - 695016
2010-11




Contents
1 Introduction 5
2 PCM Technology 6
2.1 History and background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Memory cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Operation . . . . . . . . . . ....etc

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The ability of molecules to serve as computer switches has been a major area of scientific research since the middle of the last century. Molecular switches, if these become a reality, will offer appreciable reduction in hardware size, since these are themselves very small. One can then imagine of bimolecular computer about 1/20th the size of present-day semiconductor-based computers. Small size and fast operation will account for the development of most modern computers. ....etc

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ABSTRACT
While magnetic and semi-conductor based information storage devices have been in use since the middle 1950â„¢s, todayâ„¢s computers and volumes of information require increasingly more efficient and faster methods of storing data. Among the most promising of the new alternatives are photopolymer-based devices, holographic optical memory storage devices, and protein-based optical memory storage using rhodopsin , photosynthetic reaction centers. This paper focuses mainly on protein-based optical memory storage using the photosen ....etc

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Definition
Since the dawn of time, man has tried to record important events and techniques for everyday life. At first, it was sufficient to paint on the family cave wall how one hunted. Then came the people who invented spoken languages and the need arose to record what one was saying without hearing it firsthand. Therefore, years later, earlier scholars invented writing to convey what was being said. Pictures gave way to letters which represented spoken sounds. Eventually clay tablets gave way to parchment, which gave way to paper. Paper was ....etc

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While magnetic and semi-conductor based information storage devices have been in use since the middle 1950 s, today s computers and volumes of information require increasingly more efficient and faster methods of storing data. While the speed of integrated circuit random access memory (RAM) has increased steadily over the past ten to fifteen years, the limits of these systems are rapidly approaching. In response to the rapidly changing face of computing and demand for

· physically smaller,

· greater capacity,

 ....etc

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Name– study of diode matrix ROM.
Aim – to study the process of memory storage and memory address locations.
Apparatus – rectifier diodes, circuit board, DC power supply, resistors, connecting wires, soldering iron, cutter etc.
Circuit diagram –




Brief theory – a read only memory (ROM) can store thousands of binary numbers representing computer instructions and data. Some of the smaller ROMs are also used to implement t ....etc

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Computer Memory Based on the Protein Bacteriorhodopsin


While magnetic and semi-conductor based information storage devices have been in use since the middle 1950's, today's computers and volumes of information require increasingly more efficient and faster methods of storing data. While the speed of integrated circuit random access memory (RAM) has increased steadily over the past ten to fifteen years, the limits of these systems are rapidly approaching. In response to the rapidly changing face of computing and demand for

· ....etc

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