Circuit structure and resulting circuitry for multiple-valued logic. The circuit structure allows the design and fabrication of any r-valued logic function of n-places where r is an integer greater than 1 and n is an integer greater than 0. This structure is called SUpplementary Symmetrical LOgic Circuit...http://www.google.com.tw/patents/US6133754?utm_source=gb-gplus-share專利 US6133754 - Multiple-valued logic circuit architecture; supplementary symmetrical logic circuit structure (SUS-LOC)
