I'm trying to answer a question on propagation delay. The question is:
Assuming the propagation delays for different circuits are as follow:
- 4 ns for XOR gate,
- 3 ns for OR gate,
- 5 ns for NAND gate and
- 12 ns for a 4-by-1 multiplexer,
calculate the propagation delay for a change at input A to reach the output F, when all other inputs are constant.
The circuit is below
I have calculated the propagation delay to be 14ns. Is this correct?