Lin Zhiting

A Control Unit Circuitry Design for High Performance HYBRID CAM

Content addressable memory (CAM) can compare the search data with all the stored data in parallel, which is widely used in many applications that require fast table lookup. Because of its advantages on performance, the HYBRID CAM structure has become the main research object. In this paper we propose a control unit circuitry design for high performance HYBRID CAM. In our design, the discharge path of ML will be controlled by both NOR-types match-line and NAND-types match-line, which is efficient in power consumption. Meanwhile, the discharge path of ML is also modified to discharge to ground through only one transistor directly. Simulation results show that discharge speed can achieve 20% delay improvement and the power consumption can be reduced 60.5% compared with the conventional Hybrid CAM structure.