Adaptive performance control with embedded timing error predictive sensors for subthreshold circuits

摘要

This paper presents an adaptive technique for compensating manufacturing and environmental variability in subthreshold circuits using ¿canary flip-flop¿ that can predict timing errors. A 32-bit Kogge-Stone adder whose performance was controlled by body-biasing was fabricated in a 65 nm CMOS process. Measurement results show that the adaptive control can reduce the power dissipation by 46% in comparison with the worst-case design with guardbanding.