Energy-delay tradeoffs of low-voltage dual mode logic in 28nm FD-SOI

In this paper, the Dual Mode Logic (DML) technique is evaluated on a low-voltage 16-bit Carry Skip Adder in 28 nm UTBB FD-SOI technology. By combining the operating characteristics of the DML and the unique features of the technology, energy/speed efficient low-voltage adder designs can be defined. More precisely, it is demonstrated that, the capability of the DML design to switch on-the-fly between static and dynamic modes of operation leads to an improvement of more than 20% in terms of energy-delay product (EDP) in comparison to the conventional CMOS design. Moreover, the high efficiency of back plane biasing in the adopted technology allows very fine tuning of energy-delay performances of a DML design, thus emphasizing its intrinsic versatility.