I want to simulate some digital circuits and see the variation of signals at the different stages of the circuits. Also, I need to find the time it takes for the signal to propagate. For example, let us consider a basic AND gate shown below.
The scope always shows the time taken for the signal to reach the high state as immediate, no matter what value I set the simulation time to. Like for example, in this case I have reduced the simulation time to picoseconds and still the output change is shown to be immediate.
So, my question is how to find the delay or simulation time of various circuits.