Low-string on-chip signaling techniques: effectiveness and robustness
IEEE Transactions on Very Large Scale Integration (VLSI) Systems - Special section on low-power electronics and design
Low-power on-chip communication based on transition-aware global signaling (TAGS)
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
VLSID '06 Proceedings of the 19th International Conference on VLSI Design held jointly with 5th International Conference on Embedded Systems Design
Self-Time Regenerators for High-Speed and Low-Power Interconnect
ISQED '07 Proceedings of the 8th International Symposium on Quality Electronic Design
Power and reliability management of SoCs
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
Proceedings of the 19th ACM Great Lakes symposium on VLSI
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
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Current-mode signaling (CMS) with dynamic overdriving is one of the most promising scheme for high-speed low-power communication over long on-chip interconnects. However, they are sensitive to parameter variations due to reduced voltage swings on the line. In this paper, we propose a variation tolerant dynamic overdriving CMS scheme. The proposed CMS scheme and a competing CMS scheme (CMS-Fb) are fabricated in 180-nm CMOS technology. Measurement results show that the proposed scheme offers 34% reduction in energy/bit and 42% reduction in energy-delay-product over CMS-Fb scheme for a 10 mm line operating at 0.64 Gbps of data rate. Simulations indicate that the proposed CMS scheme consumes 0.297 pJ/bit for data transfer over the 10 mm line at 2.63 Gb/s. Measurements indicate that the delay of CMS-Fb becomes 2.5 times its nominal value in the presence of intra-die variations whereas the delay of the proposed scheme changes by only 5% for the same amount of intra-die variations. Measurement and simulation results show that both the schemes are robust against inter-die variations. Experiments and simulations also indicate that the proposed CMS scheme is more robust against practical variations in supply and temperature as compared to CMS-Fb scheme.