Associative memory circuit judging whether or not a memory cell content matches search data by performing a differential amplification to a potential of a match line and a reference potential

摘要

This associative memory circuit comprises a plurality of logic circuits connected to a common match line. Each of the logic circuits compares a content stored in each of a plurality of memory cells with externally supplied search data so as to output a comparison result thereof to the match line. The associative memory circuit also comprises a reference-potential producing circuit provided correspondingly for the match line so as to produce a reference potential used in relation with the match line, and a differential amplifier circuit performing a differential amplification to a potential of the match line and the reference potential so as to judge whether or not the content matches the search data.