A 16-Kbit Theta -search associative memory

The design of a high-capacity Theta -search associative memory ( Theta in (<,>,or=,= not=)) is presented. PSPICE simulation and layouts show that the proposed Theta -search associative memory chip consisting of 256 words, each 64-b long, can fit on a 13.5-mm*9.5-mm chip. It can perform maskable Theta -search operations over its contents in 110 ns.<>