Self-Checking Carry Select Adder with Fault Localization

The common design problem in various approaches for self-checking adders is the fault propagation due to carry. Such a fault can misguide the system to detect the particular faulty module. In this paper, we proposed a self-checking Carry Select Adder (CSA) with fault localization ability. Our scheme can provide minimum area overhead for self-recovery process because instead of replacing the whole system we can now replace the particular faulty modules. The proposed self-checking CSA consumes 12% less area with equal performance as compared to the previously proposed self-checking CSA approach.