Earticle

This paper presents a concurrent error detection (CED) technique for a bit-slice of a full-adder. The proposed method involves computing the sum and carry bits in two alternative ways so that transient faults will be detected by comparing the results (Sum and Carry out) obtained from the two computing paths. This technique attempts to reduce the amount of extra hardware and circuit cost. In order to avoid the problem of extra delay we will propagate the result when the first computation is finished so that dependent computation can commence execution as soon as possible. To prove the efficiency of the proposed method, the circuit is simulated in standard CMOS 32nm technology and some transient faults are voluntarily injected into the circuit layout. The proposed design provides a 12.12% saving in transistor count compared to a DMR (Dual Modular Redundancy) style design.