Design of Low Power Speculative Han-Carlson Adder
Abstract—In this paper we have proposed speculative Han-Carlson adder. The proposed adder Employs speculation: the exact mathematic function is replaced with an approximated one that is faster and gives the correct result most of the time, but not for all time. The approximated adder is augmented with an error detection network that asserts an error signal when speculation fails. The speculative adder to reduce delay and power consumption compared to non-speculative adder and simulated using ModelSim 6.3f. Delay and power consumption of non-speculative and speculative Han-Carlson adder were analyzed using Xilinx ISE 8.1i.
Index Terms—Addition, mathematic, non-speculative adder, speculative adder, delay, power consumption.
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International Journal for Trends in Technology & Engineering © 2015 IJTET JOURNAL