Bebop to the Boolean Boogie, 3rd Edition

Appendix F. Pass-Transistor Logic

“Would you pass the logic, please?”

The term pass-transistor logic refers to techniques for connecting MOSFET transistors such that “data” signals pass between their source and drain terminals. These techniques minimize the number of transistors required to implement a function, but they are not recommended for the novice or the unwary because strange and unexpected effects can ensue. Pass-transistor logic is typically employed by designers of full-custom integrated circuits or ASIC cell libraries. The following examples introduce the concepts of pass-transistor logic, but they are not intended to indicate recommended design practices.

In the case of the AND (Figure F.1), the resistance of R¹ is assumed to ...