Before revision: Derivation of delay in a logic gate Delay is expressed in terms of a basic delay unit, τ = 3RC, the delay of an inverter driving an identical inverter with no parasitic capacitance ; the unitless number associated with this is known as the normalized delay.
After revision: Derivation of delay in a logic gate Delay is expressed in terms of a basic delay unit, τ = 3RC, the delay of an inverter driving an identical inverter without any additional capacitance added by interconnects or other loads ; the unitless number associated with this is known as the normalized delay.