simulator lang=spectre
global gnd!
vdd (vdd! 0) vsource dc=3
Gnd (gnd! 0) vsource dc=0
V1 (A 0)  vsource  type=pulse  val0=0  val1=3  delay=0  rise=0.05n  fall=0.05n  width=1m  period=2m
V2 (B 0)  vsource  type=pulse  val0=0  val1=3  delay=0  rise=0.05n  fall=0.05n  width=2m  period=4m