I don't wish to introduce delay in my waveform but rather i want to calculate the delay of the inverter using my proposed equation. The simulated circuit can be used to calculate delay..this i m aware of..but in the second step i want to validate my proposed model against the simulated one...so how do i do this?Here is how you vary the delay timing:View attachment 107549
You can make either argument to Delay() a function of various things. Either argument can be an arbitrarily complex expression which is a function of some node voltage, branch current, or a varying parameter as I show above.
the eq. at #1 is quite simplistic - that is - it means it's more likely to "match" (loosely) a huge amount of experiment data (with systematic errors -- not shown in your formula) why don't you show us the part of the grid with test points on the signal path & everything in betweenproposed equation