UNIVERSAL PROGRAMMABLE LOGIC FUNCTION

A programmable, universal logic circuit is disclosed which provides with a minimum of back wiring, any of the basic logic functions 1/1, 1/2, 1/3, 1/4, 2/2, 2/3, 2/4, and reset (R-S) flip-flop and can be used as a basic building block in the construction of more complex logic functions than those presently described. The m/n notation completely describes most required functions in that n is the total number of inputs and m is the minimum number of those n inputs which must indicate a given logic state in order to cause some predetermined action. In addition, the universal circuit is designed such that unused inputs left floating, will be accepted as assuming an alternate logic state, not requiring some predetermined action. Thus, a m/n function can degenerate to a m/(n-1) or a m/(n-2) function if one or two inputs, respectively, are not supplied.