M. Yabuuchi, K. Nii, S. Tanaka, Y. Shinozaki, Yoshiki Yamamoto, T. Hasegawa, H. Shinkawata, S. Kamohara
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A 65 nm 1.0 V 1.84 ns Silicon-on-Thin-Box (SOTB) embedded SRAM with 13.72 nW/Mbit standby power for smart IoT
A 65-nm Silicon-on-Thin-Box (SOTB) embedded SRAM is demonstrated. By using back-bias (BB) control in the sleep mode, 13.72 nW/Mbit ultra-low standby power is observed, which is reduced to 1/1000 compared to the normal standby mode. The measured read access time with forward BB is 1.84 ns at 1.0 V overdrive and 25°C, which is improved by 60% and thus we achieved over 380 MHz operation. Up to 20% active read power reduction is also achieved by using proposed localized adoptive wordline width control.
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