Abstract
Low-power and high-speed calculation is very important nowadays for energy-efficient demand of electronic devices. With the usage of ANT (All-N-transistor) logic, the speed constraint caused by PMOS transistors can be overcome through an auxiliary current path across NMOS transistors. This study presents a 800-MHz 28.8-mW 8-bit carry look-ahead adder (CLA) using ANT logic implemented on chip. FinFET technology is utilized to improve carrier mobility and increase device speed. R-C parasitic capacitance in FinFET devices is considered in the analysis of the delay time for the 8-bit CLA to improve PDP (power-delay product). The proposed design is implemented in 16-nm FinFET process with core area of 206.403 \(\times \) 152.506 \(\upmu \)m\(^2\). It has the lowest normalized PDP at 60 pF load by far.
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Acknowledgements
This study was funded partially by the Ministry of Science and Technology, Taiwan under Grant Nos. MOST 109-2218-E-110-007-, MOST 109-2221- E-230-007-, MOST 109-2224- E-110-001- and MOST 110-2218-E-110-008-. In addition, the authors would also like to convey their heartfelt thanks to Taiwan Semiconductor Research Institute (TSRI) of National Applied Research Laboratories (NARL), Taiwan, for chip fabrication and EDA tool assistance.
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Wang, CC., Jose, O.L.J.A., Yang, WS. et al. A 16-nm FinFET 28.8-mW 800-MHz 8-Bit All-N-Transistor Logic Carry Look-Ahead Adder. Circuits Syst Signal Process 42, 2283–2304 (2023). https://doi.org/10.1007/s00034-022-02212-2
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DOI: https://doi.org/10.1007/s00034-022-02212-2