Result Analysis of Carry Skip Adder using High-Speed Skips Logic at Different Levels
Volume: 5 - Issue: 07 - Date: 01-07-2016
Approved ISSN: 2278-1412
Published Id: IJAECESTU282 | Page No.: 1101-1105
Author: Rajesh sahu
Co- Author: Deepak Kumar
Abstract:-A carry skip adder (CSKA) structure has the high speed and very low power
consumption. The speed of the structure is achieved by concatenation of all the blocks. The
incrimination blocks are used to improve the efficiency of the carry skip adder structure. In
existing method multiplexer logic is used, the proposed structure uses the AND-OR-Invert (AOI)
and OR-AND-Invert (OAI) for the skip logic. The carry skip adder structure is realized with both
fixed stage size and variable stage size where the delay is reduced, and speed is improved. A
hybrid variable latency extension lowers the power consumption without affecting the speed of the
circuit. The results are obtained using XILINX 14.3 and it gives improvements in the delay and
energy of the structures. In addition to this structure, the power–delay product was low among all
the structures, while having its energy–delay product was almost same as that of the conventional
structure. Simulations on the proposed structure by using hybrid variable latency CSKA reduces
the power consumption compared with the previous works and it produces a high speed.
Key Words:-Carry skip adder (CSKA), energy efficient, high performance, hybrid variable latency Adders,
Area:-Engineering
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