Table 3 State of transistors at evaluation phase for different values of SIGMA

From: Two novel low-power and high-speed dynamic carbon nanotube full-adder cells

SIGMA T1 T2 T3 TB SUM C O U T ¯
0 Off Off On On "0" Unchanged ("1")
1 Off Off Off On Unchanged ("1") Unchanged ("1")
2 On On Off On "0" "0"
3 On On Off Off Unchanged ("1") "0"