Device and Circuit Design Challenges in the Digital Subthreshold Region for Ultralow-Power Applications

Table 6

Comparison of CNFETs and MOSFETs for subthreshold operation [52].

Ring osci.freq	Super-threshold
	65 nm MOSFET			CNFET
	0.267 GHz			2.24 THz
	D (ns)	P (nw)	PDP (aJ)	D (ps)	P (nw)	PDP (aJ)
Full adder	6	31	190	0.5	21	0.01
4-bit RCA	6.2	74.7	470	14	98.5	1.38