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High Speed Carry Skip Logic by Using Concatenation and Incrementation Scheme
Abstract—In our paper, we proposing a high speed and energy efficient carry skip adder known as concatenation and incrementation carry skip adder(CI-CSKA).In this we are adding an incrementation block in addition to the conventional structure of carry skip adder and replaces the multiplexer logic with low power gates such as AOI and OAI gates for performing skip operation .The drawback of this modified structure is the increased power consumption while it can be used in high speed application .This difficulty is overcome by replacing some of the RCA block in the modified structure with binary excess converter .This method reduces power consumption by maintaining the speed. Xilinx ISE 8.1i software is used to verify the simulation result and Modelsim is used to obtain waveform representation of the model.
Index Terms— CSKA, CI-CSKA, BEC, OAI, AOI, CSLA
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International Journal for Trends in Technology & Engineering © 2015 IJTET JOURNAL