One form of NMOS circuit logic that minimizes power dissipation and maximize device density is called

Pass-Transistor logic (PTL), also known as the Transmission gate is BASED on the use of MOSFETs as switches, rather than inverters.Example: A single NMOS transistor can be used as a PTL switch: The switch is CONSIDERED closed when the voltage applied to the gate is logic high and is considered as open when the voltage applied to the gate is logic low.The output (y) is logic high, when the input (A) is logic high & switch controlled signal (B) is logic high & it is not logic high for all other combinations.Features of PTL includes:Gate is STATIC.‘N’ transistor used instead of 2NNo static power dissipation.It is ratioless and Bidirectional.