Performance Analysis of Modified Drain Gating Techniques for Low Power and High Speed Arithmetic Circuits

Table 1

Power and delay values of NAND gate, FA, and 8-bit RCA using various techniques.

Circuit techniques	NAND gate		FA		8-bit RCA
	Power; (nW)	Delay; (ps)	Power; (nW)	Delay; (ps)	Power; (uW)	Delay; (ps)
Standard CMOS	22.32	45𝑒3	2.1𝑒3	30𝑒3	52.2	23.7𝑒3
Drain gating	12.63	25𝑒3	393	15𝑒3	7.53	8.85𝑒3
Power gating	8.73	205𝑒3	238	150𝑒3	2.39	20.5𝑒3
DHPF	11.08	80𝑒3	340	25𝑒3	3.02	12𝑒3
DFPH	8.71	175𝑒3	245	150𝑒3	4.02	15.5𝑒3
HS-drain gating	18.42	2.22	250	15.08	6.97	10.3
HS-power gating	16.57	11.76	246	49.9	2.13	21.4
HS-DHPF	16.70	6.3	248	35.97	4.15	11.9
HS-DFPH	16.64	11.71	247	44.87	2.92	17