simulator lang=spectre
global gnd!
vdd (vdd! 0) vsource dc=3
Gnd (gnd! 0) vsource dc=0
V1 (A7 0)  vsource  dc=0
V2 (A6 0)  vsource  dc=0
V3 (A5 0)  vsource  dc=0
V4 (A4 0)  vsource  dc=0
V5 (A3 0)  vsource  dc=3
V6 (A2 0)  vsource  dc=3
V7 (A1 0)  vsource  dc=3
V8 (A0 0)  vsource  dc=3
V9 (B7 0)  vsource  dc=0
V10 (B6 0)  vsource dc=3 
V11 (B5 0)  vsource dc=0
V12 (B4 0)  vsource dc=0
V13 (B3 0)  vsource dc=0
V14 (B2 0)  vsource dc=3
V15 (B1 0)  vsource dc=3
V16 (B0 0)  vsource dc=0
V17 (S0 0)  vsource  type=pulse  val0=3  val1=0  delay=0  rise=0.05n  fall=0.05n  width=1m  period=2m
V18 (S1 0)  vsource  type=pulse  val0=3  val1=0  delay=0  rise=0.05n  fall=0.05n  width=2m  period=4m
V19 (S2 0)  vsource  type=pulse  val0=3  val1=0  delay=0  rise=0.05n  fall=0.05n  width=4m  period=8m