Inverter Circuit

M1 OUT IN VDD VDD CMOSP L=0.18u W=1.8u
M2 OUT IN 0 0 CMOSN L=0.18U W=0.9U
VDD VDD 0 1.8

VIN IN 0 AC 0.5
CLOAD OUT 0 20fF

.op
.AC DEC 10 1 100Meg
.PLOT Vdb(IN) Vdb(OUT)
.option post

.LIB "tsmc_018um_model" CMOS_MODELS     

.END