THE GATEBOOK

Normalization Lectures

Inverter has propagation delay of , AND, OR gates have propagation delay.

Initially A = 0, B = 1, C = 0.

For every A,B,C are updated to new values as shown below.

t=5 A = 1,B=1,C=0

t=10 A=1,B=0,C=1

t=15 A=1,B=0,C=0

Output of the circuit at t=25 and t=30 respectively:

A) 1,0 B) 0,1 C) 1,1 D) 0,0

Edit: A,B,C values are not changed after t = 15 nsec

Same way we can compute x3(25).

The key idea is to find the output as if there is no delay at all then shift right side by that delay,

Now, we can see from the above diagram there is 1 output at 25ns and 1 output at 30ns

So, In this way, we can draw the timing diagram of a circuit.