11-06-2014, 12:03 PM
SEMINAR REPORT ON OUM (OVONIC UNIFIED MEMORY)
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INTRODUCTION TO OUM
Almost 25% of the world wide chip markets are memory devices, each type used for their specific advantages: the high speed of an SRAM, the high integration density of a DRAM, or the nonvolatile capability of a FLASH memory device.The industry is searching for a holy grail of future memory technologies to service the upcoming market of portable and wireless devices. These applications are already available based on existing memory technology, but for a successful market penetration. A higher performance at a lower price is required. The existing technologies are characterized by the following limitations. DRAMs are difficult to integrate. SRAMs are expensive. FLASH memory can have only a limited number of read and write cycles .EPROMs have high power requirement and poor flexibility.
Radiation Immunity:-
One very important advantage offered by OUM over other conventional memory types, is irradiation immunity. FLASH memory stores the bits in the form of connections between the floating gate and the control gate. FLASH which is otherwise nonvolatile, can loose its data in the presence of radiations which are very common considering Medical and Space applications. The memory element is exposed to ionizing radiation which have the ability to eject an electron thereby causing disruption of the links which form the basis of memory storage in the flash memory.
CONCLUSION
Unlike conventional flash memory Ovonic unified memory can be randomly addressed. OUM cell can be written 10 trillion times when compared with conventional flash memory. The computers using OUM would not be subjected to critical data loss when the system hangs up or when power is abruptly lost as are present day computers using DRAM a/o SRAM. OUM requires fewer steps in an IC manufacturing process resulting in reduced cycle times, fewer defects, and greater manufacturing flexibility. These properties essentially make OUM an ideal commercial memory. Current commercial technologies do not satisfy the density, radiation tolerance, or endurance requirements for space applications. OUM technology offers great potential for low power operation and radiation tolerance, which assures its compatibility in space applications. OUM has direct applications in all products presently using solid state memory, including computers, cell phones, graphics-3D rendering, GPS, video conferencing, multimedia, Internet networking and interfacing, digital TV, telecom, PDA, digital voice recorders, modems, DVD, networking (ATM), Ethernet, and pagers. OUM offers a way to realize full system-on-achip capability through integrating unified memory, linear, and logic on the same silicon chip.