Tri-State Buffer

.lib "./libs/models/sky130.lib.spice" tt

XM1 inbar in gnd gnd sky130_fd_pr__nfet_01v8 w=0.42 l=0.21
XM2 inbar in vdd vdd sky130_fd_pr__pfet_01v8 w=0.84 l=0.21

XM3 net1 inbar vdd vdd sky130_fd_pr__pfet_01v8 w=1.26 l=0.21
XM4 out enbar net1 vdd sky130_fd_pr__pfet_01v8 w=1.26 l=0.21

XM5 out en net2 gnd sky130_fd_pr__nfet_01v8 w=0.42 l=0.21
XM6 net2 inbar gnd gnd sky130_fd_pr__nfet_01v8 w=0.42 l=0.21


V1 vdd gnd dc 1.8v
Vin in gnd pulse 0 1.8 0 10ps 10ps 5ns 10ns
Ven en gnd pulse 0 1.8 0 10ps 10ps 20ns 40ns
Venb enbar 0 pulse 1.8 0 0 10ps 10ps 20ns 40ns

.tran 0.1n 100n
.control 
run  
plot V(en)+6 V(enbar)+4 V(in)+2 V(out)
.endc
.end