High density CAM array architectures with adaptive current controlled match-line discharge

摘要

An integrated circuit having a CAM array includes a plurality of CAM cells organized in rows and columns where each row corresponds to an address word and each column corresponds to a bit position, and a match line for each row connected to be shared by CAM cells in that row. The CAM array also includes a feedback circuit for each row connected to limit a discharge voltage for a corresponding match line in that row. In another aspect, a method of operating an integrated circuit having a CAM array includes organizing a plurality of CAM cells in rows and columns where each row corresponds to an address word and each column corresponds to a bit position, and sharing a match line with CAM cells in each row. The method also includes limiting a discharge voltage for the match line.