Though its a bit encumbersome to get the points what I have mentioned...I plea for learning cum sympathiseDefinition: Propagation delay, symbolized tpd, is the time required for a digital signal to travel from the input(s) of a logic gate
to the output. It is measured in microseconds(µs),nanoseconds (ns), or picoseconds (ps), where 1 µs = 10-6 s, 1 ns = 10-9 s, and 1 ps = 10-12 s.The propagation delay for an integrated circuit (IC) logic gate may differ for each of the inputs. If all other factors are held constant, the average propagation delay in a logic gate IC increases as the complexity of the internal circuitry increases. Some IC technologies have interently longer tpd values than others, and are considered "slower." Propagation delay is important because it has a direct effect on the speed at which a digital device, such as a computer, can operate. This is true of memory chips as well as microprocessors.
to the output. It is measured in microseconds(µs),nanoseconds (ns), or picoseconds (ps), where 1 µs = 10-6 s, 1 ns = 10-9 s, and 1 ps = 10-12 s.The propagation delay for an integrated circuit (IC) logic gate may differ for each of the inputs. If all other factors are held constant, the average propagation delay in a logic gate IC increases as the complexity of the internal circuitry increases. Some IC technologies have interently longer tpd values than others, and are considered "slower." Propagation delay is important because it has a direct effect on the speed at which a digital device, such as a computer, can operate. This is true of memory chips as well as microprocessors.