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Full-Text Articles in VLSI and Circuits, Embedded and Hardware Systems

Wide I/O Dram Architecture Utilizing Proximity Communication, Qawi Ibnzayd Harvard Dec 2009

Wide I/O Dram Architecture Utilizing Proximity Communication, Qawi Ibnzayd Harvard

Boise State University Theses and Dissertations

The bandwidth and power consumption of dynamic random access memory, used as the main memory of a computer system, impacts the computer’s execution rate even with the existence of a memory hierarchy. DRAM manufacturers focus on density increases due to the innate price per bit decline of main memory while processor manufacturers continually focus on boosting performance by increasing the number of instructions completed per second. This leads to a performance gap between the microprocessor and DRAM.

Proximity communication promises to increase the I/O density of DRAM products while reducing the power consumption of the main memory system. This thesis …


Phase Change Memory: Array Development And Sensing Circuits Using Delta-Sigma Modulation, Mahesh Balasubramanian Jul 2009

Phase Change Memory: Array Development And Sensing Circuits Using Delta-Sigma Modulation, Mahesh Balasubramanian

Boise State University Theses and Dissertations

Chalcogenide based non-volatile Phase Change Memory (PCM) circuits were designed to investigate new emerging non-volatile memory technologies. An overview of the operation of chalcogenide-based resistive PCM for circuit designers is presented. MOSIS fabrication service was used along with Idaho Microfabrication Lab at Boise State University to develop PCM chips. Experimental results show successful integration of two discreet processing services for developing chalcogenide based non-volatile memory circuits. Possible multi-state capabilities were observed during the testing of single memory bits.

Four Delta Sigma Modulation (DSM) based sensing techniques for resistive memory are presented. The proposed sensing techniques have the advantage over traditional …