Designing and Characterization of koggestone, Sparse Kogge stone, Spanning tree and Brentkung Adders
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2013, Vol 3, Issue 4
Abstract
Adders are known to be the frequently used ones in VLSI designs. In digital design we have half adder and full adder, by using these adders we can implement ripple carry adder(RCA). RCA is used to perform any number of additions. In this RCA is serial adder and it has propagation delay problem. With increase in ha & fa circuits, delay also increases simultaneously. That’s the reason these parallel adders (parallel prefix adders) are preferred. The parallel prefix adders are KS adder(kogge-stone),SKS adder(sparse kogge-stone),Spanning tree and Brentkung adderS. These adders are designed and compared by using area and delay constraints. Simulation and synthesis by model sim6.4b, Xilinx ise10.1i.
Authors and Affiliations
V. Krishna Kumari
Keywords
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