for CMOS inverter, if my propagation delay of a gate is given to be 5ns. what should be the maximum operating frequency for correct output logic level.( if i am having a chain of inverters)??
To be accurate, it depends on the number of inverters you are having. Let us assume you have 'x' inverters.
You know f = 1/T. So the maximum operating frequency = 1/(5ns*n) = (200MHz/n).
So if you have 2 gates, the maximum operating frequency is 200MHz.