simulator lang=spectre
global gnd!
vdd (vdd! 0) vsource dc=3
Gnd (gnd! 0) vsource dc=0
V1 (A 0) vsource dc = 3
V2 (B 0) vsource dc = 0
V3 (S0 0) vsource type=pulse val0=3 val1=0 delay=0 rise=0.05n fall=0.05n width=1m period=2m
V4 (S1 0) vsource type=pulse val0=3 val1=0 delay=0 rise=0.05n fall=0.05n width=2m period=4m
V5 (S2 0) vsource type=pulse val0=3 val1=0 delay=0 rise=0.05n fall=0.05n width=4m period=8m
V6 (Cin 0) vsource type=pulse val0=3 val1=0 delay=0 rise=0.05n fall=0.05n width=2m period=4m