Clock routing for high-performance ICs
DAC '90 Proceedings of the 27th ACM/IEEE Design Automation Conference
Analysis and mitigation of variability in subthreshold design
ISLPED '05 Proceedings of the 2005 international symposium on Low power electronics and design
Accurate buffer modeling with slew propagation in subthreshold circuits
ISQED '09 Proceedings of the 2009 10th International Symposium on Quality of Electronic Design
Slew-aware clock tree design for reliable subthreshold circuits
Proceedings of the 14th ACM/IEEE international symposium on Low power electronics and design
Clock network design for ultra-low power applications
Proceedings of the 16th ACM/IEEE international symposium on Low power electronics and design
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This paper presents a design methodology for robust and low-energy clock networks for ultra-low voltage (ULV) circuits. We show that both clock slew and skew play important roles in achieving high maximum operating frequency (Fmax) and low clock energy in ULV circuits. In addition, clock networks in ULV circuits are highly sensitive to process variations. We propose a variation-aware methodology that controls both clock skew and slew to maximize Fmax and minimize clock power. Experimental results show that our clock network design method achieves lower energy (more than 20% savings) at comparable or even higher Fmax compared with the existing methods.