A fuzzy programmable logic array (fuzzy PLA)

Abstract

A fuzzy programmable logic array (PLA) employing a bipolar analog technology is presented. The fuzzy PLA consists of MAX columns, MIN columns, and input/output (I/O) lines. Base fuses and emitter fuses are located in both columns. Programming is accomplished by blowing these fuses by high current pulses. Sometimes, these fuses can be replaced with thin isolation films, which are imbedded in the crossing of I/O lines and emitter lines of MAX/MIN columns. Programming of this type of fuzzy PLA is done by applying a high voltage to the selected isolation film to break down and short two crossing lines. Two applications of the fuzzy PLA are also described.<>