CAM中匹配线能量延迟积有效的一种级联电荷共享技术

A novel cascaded charge-sharing technique is presented in content-addressable memories（CAMs）,which not only effectively reduces the match-line（ML） power by using a pre-select circuit,but also realizes a high search speed.Pre-layout simulation results show a 75.9% energy-delay-product（EDP） reduction of the MLs over the traditional precharge-high ML scheme and 41.3% over the segmented ML method.Based on this technique,a test-chip of 64-word × 144-bit ternary CAM（TCAM） is implemented using a 0.18-μm 1.8-V CMOS process,achieving an 1.0 ns search delay and 4.81 fJ/bit/search for the MLs.