A five-inputs flip-flop
Jordi Aguiló, Elena Valderrama · IEE Proceedings E Computers and Digital Techniques · 1980
A study is presented about a family of bistables whose first elements are the D and JK flip-flops, and whose main property is the fact that we are able to synthesise any autonomous sequential machine having up to 2i internal states (?i ? i) with just i flip-flops of the type defined by the ith element of the family, and without combinational gates.