AUTHORS: Azam Beg, V. Beiu, and W. Ibrahim
PUBLICATION/VENUE: 2011 IEEE 9th International New Circuits and Systems Conference (NEWCAS), Jun 2011, pp. 498-501.
Voltage reduction is a very widely used low-power technique (as reducing dynamic power quadratically, and leakage power linearly) which does sacrifice performance. An alternate technique, which is much less explored/investigated, is to rely on currents instead. The paper presents a thorough but still preliminary comparison of a recently introduced CMOS design technique which limits/reduces currents, with both the conventional/classical CMOS design, and also with a fresh subthreshold CMOS design specifically aimed for ultra-low power (ULP). The preliminary results reported here suggest that the new design could achieve: (i) significantly lower power than classical CMOS (20-60Å~) without drastically degrading performances (5-20Å~); (ii) much better performances (100-200Å~) than the ULP scheme considered at power levels which are manageable (10-40x); while (iv) surpassing both of them on power-delay-product (PDP) and energy-delay-product (EDP). In particular, our inverters in 16nm are able to break the atto- Joule barrier at 300mV, and exhibit a delay of about 9ns.
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