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A Low Power Static Random Access Memory Cell with High Read Stability

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In this paper, a 9T static random access memory (SRAM) cell design which consumes less dynamic power and has high read stability is proposed. In conventional six transistor (6T) SRAM cell, read stability is very low due to the voltage division between the access and driver transistors during read operation. Existing 9T SRAM cell design increases the read static noise margin (SNM) by twice as compared to conventional 6T SRAM cell by completely isolating the bit-lines during the read operation. But the write operation is performed in this cell, by charging/discharging of large bit line capacitances causing 22.5% increase in dynamic power consumption. In the proposed technique, the SRAM cell utilizes charging/discharging of a single bit-line (BL) during power consumption by 45% as compared to a conventional 6T SRAM cell while the read SNM is also maintained at twice the read SNM of the conventional 6T SRAM cell. All simulations of the proposed 9T SRAM cell has been carried out in 0.13 μm CMOS technology.
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Keywords: DYNAMIC POWER CONSUMPTION; READ STABILITY; SRAM (STATIC RANDOM ACCESS MEMORY); STATIC NOISE MARGIN

Document Type: Research Article

Publication date: 2012-08-01

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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