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Variation-Resilient Building Blocks for Ultra-Low-Energy Sub-Threshold Design

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2 Author(s)
Reynders, N. ; Dept. of Electr. Eng. (ESAT), KU Leuven, Leuven, Belgium ; Dehaene, W.

This paper presents the design of variation-resilient ultra-low-voltage circuits functioning at MHz-speed. By careful design, robust digital circuits operating in the sub-threshold region are achieved. The paper discusses circuit techniques to obtain building blocks that are able to overcome the high sensitivity to variations and the decreased current ratios in sub-threshold while retaining MHz-performance. The building blocks are successfully implemented in two chips fabricated in 90 nm CMOS technology. Measurements show that the variation-resilient designs are fully functional at ultra-low supply voltages and obtain clock frequencies in the MHz-range and sub-pJ energy consumptions.

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Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:59 ,  Issue: 12 )