G⁴FET Implementations of Some Logic Circuits

Some logic circuits have been built and demonstrated to work substantially as intended, all as part of a continuing effort to exploit the high degrees of design flexibility and functionality of the electronic devices known as G4FETs and described below. These logic circuits are intended to serve as prototypes of more- complex advanced programmable-logic-device- type integrated circuits, including field-programmable gate arrays (FPGAs). In comparison with prior FPGAs, these advanced FPGAs could be much more efficient because the functionality of G4FETs is such that fewer discrete components are needed to perform a given logic function in G4FET circuitry than are needed perform the same logic function in conventional transistor-based circuitry. The underlying concept of using G4FETs as building blocks of programmable logic circuitry was also described, from a different perspective, in “G4FETs as Universal and Programmable Logic Gates” (NPO-41698), NASA Tech Briefs, Vol. 31, No. 7 (July 2007), page 44.