Variation of t0 and K with Gate size
For an inverter, a relationship exists between t0, K and N, when N is the size of the inverter (N = 1x, 2x, etc).
Some data (TPHL prop delay)
1X inv 71 ps 114 ps 468 ps
3X inv 71 ps 86 ps 207 ps
Why is no load delay constant with increasing size?