The figure below shows the transient characteristics for a p

The figure below shows the transient characteristics for a particular inverter loaded with 2 pF. (a) Determine the frequency of oscillation for a ring oscillator made using 17 of these gates, assuming that each stage has 2 pF load capacitance, (b) Find the dynamic dissipation for the 17-inverter ring assuming the supply voltage is 2.5V. Internal capacitance of the gates may be neglected in comparison to the external loading of 2 pF.

Solution

The realised logic here is

out = not (AC(B+D))

Explanation :

Look at the lower half n-MOS circuit saperately And the upper half is just the complementry p-MOS circuit(for convenience we call them n-MOS , p-MOS they can just be said switches, no issues)

In n-MOS circuit A and C signal is in series with parallel B and D whch makes it AC(B+D), But wait a minute when our logic is 1 the output will be Zero and vice-versa. So the output is

out = not (AC(B+D))