Self-Repairing Carry-Lookahead Adder With Hot-Standby Topology Using Fault-Localization and Partial Reconfiguration

<h3>Abstract</h3><p dir="ltr">In this paper, a self-checking and -repairing carry-lookahead adder (CLA) is proposed with distributed fault detection ability. The presented design with self-checking and fault localization ability requires an area overhead of 69.6% as compared to the conventional CLA. It can handle multiple faults simultaneously without affecting the delay of conventional CLA, with the condition that each module has a single fault at a time. The repairing operation utilizes the hot-standby approach with partial reconfiguration in which the faulty module would be replaced by an accurately functioning module at run-time. The proposed self-repairing adder with high fault coverage requires 161.5% area overhead as compared to conventional CLA design which is 35.3% less as compared to the state-of-the-art partial self-repairing CLA. Moreover, the delay of the proposed 64-bit self-repairing CLA is 40.7% more efficient as compared to conventional ripple carry adder.</p><h2>Other Information</h2><p dir="ltr">Published in: IEEE Open Journal of Circuits and Systems<br>License: <a href="https://creativecommons.org/licenses/by/4.0" target="_blank">https://creativecommons.org/licenses/by/4.0</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1109/ojcas.2022.3161873" target="_blank">https://dx.doi.org/10.1109/ojcas.2022.3161873</a></p>