Analyzing Scaled Reduced Precision Redundancy for Error Mitigation Under Proton Irradiation

Reduced precision redundancy (RPR) is an alternative to triple modular (TMR) that reduces the area overhead at expense of minor accuracy loss in case error. In this work, we propose a Scaled RPR approach for multistage circuits and analyze error mitigation tradeoffs. As study, several fast Fourier transform designs were tested with low-energy protons fault injection. Experimental results show proposed achieves good accuracy, while significantly reducing respect full TMR approach.