Proceedings of the conference on Design, automation and test in Europe: Proceedings
Ultralow-voltage, minimum-energy CMOS
IBM Journal of Research and Development - Advanced silicon technology
VLSID '08 Proceedings of the 21st International Conference on VLSI Design
A 2.6 μW sub-threshold mixed-signal ECG SoC
Proceedings of the 14th ACM/IEEE international symposium on Low power electronics and design
Wide VDDembedded asynchronous SRAM with dual-mode self-timed technique for dynamic voltage systems
IEEE Transactions on Circuits and Systems Part I: Regular Papers - Special section on 2008 custom integrated circuits conference (CICC 2008)
Single-ended subthreshold SRAM with asymmetrical write/read-assist
IEEE Transactions on Circuits and Systems Part I: Regular Papers - Special section on 2009 IEEE system-on-chip conference
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The access timing control of low-voltage static random access memory cells encounters crucial challenges in the presence of within-die (WID) variations, which induce severe delay mismatches between the timing-reference circuit and the bitlines. Prevention of early activation of sense amplifiers (SAs) is thus required to improve the yield. This brief proposes a novel SA-activation scheme by sensing differential bitIines locally and concurrently. The proposed structure effectively tolerates the WID variations and supports dynamic voltage scaling down to the subthreshold supply voltage. Measurement results show that the fabricated 8-kb test chips using 90-nm technology can be operated at the supply voltage range from 1 V (nominal Vdd) to 0.16 V. The maximum operating frequency at 0.16 V is up to 200 kHz.