.model and1 and(rise = 0.5e-9 fall = 0.3e-9)

.model nand1 nand(rise = 0.5e-9 fall = 0.3e-9)

.model or1 or(rise = 0.5e-9 fall = 0.3e-9)

.model nor1 nor(rise = 0.5e-9 fall = 0.3e-9)

.model xor1 xor(rise = 0.5e-9 fall= 0.3e-9)

.model inv1 inv(rise = 0.5e-9 fall = 0.3e-9)