Low Power CAM Cell Design With GDI Based NAND Gate

Authors : Priya Kumari , Nidhish tiwari

Volume/Issue : Volume 1 - 2016, Issue 4 - July

Google Scholar : https://goo.gl/7O3LHO

Content-addressable memory referred as CAM is a hardware table that is used to compare the search data with all the data stored in parallel to it. However, due to the parallel comparison feature the power absorption in CAM is usually considerable where a considerable amount of transistors are in active state on each lookup. This main aim of this paper is to present a hybrid-type CAM design to combine the performance advantage of the NAND type CAM with the efficiency of the power of the NOR-type CAM. In our design, two segments are formed of a single CAM word and then de copulation of all the CAM cells is done from the match line. By applying the NAND logic gates, we get the power absorption of CAM. It is obtained from the experimental results that the search energy consumption can be reduced by hybrid-type CAM by around 89% as compared to the traditional NOR-type CAM. As the NAND CAM to enhance the speed of the light weight match line discharge provides a fast pull down path, the search evaluation of the design is much better than that of the conventional NOR-type CAM. For further reduce the power consumption of the CAM design , we apply GDI methodology. We design the NAND gate with the help of GDI methodology .

Keywords : Content-addressable memory (CAM), hybrid-type CAM, NAND-type CAM, NOR-type CAM , GDI .


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