Design and Analysis of an Energy-Efficient Accuracy Configurable Adder
Richa Pathak · International Journal for Research in Applied Science and Engineering Technology · 2019
The approximate adders proposed in literature are dedicated for error-resilient applications only.These adders cannot be used in the domain where conventional adders are used or applications where we need to handle critical data with accuracy.So in this paper we proposed a Simple Accuracy Configurable Adder (SACA) that can be used in two different modes, Accurate Mode and Approximate Mode.The amount of error to be introduced at each stage is controlled with help of MUX.Further we evaluated the performance of Accuracy Configurable Adder in terms of delay, power, PDP, EDP and error characteristics.SACA is 28.36% faster and consumes 30.11% less power than RCA.PDP is the figure of merit for digital logic circuits.The less is the value of PDP, the more Energy-efficient is circuit.SACA provides 47% less PDP and 62% less EDP as compared to RCA.