Performance Analysis of N-CAM, P-CAM and TG-CAM Using 45-nm Technology

Content addressable memory (CAM) is widely used in many applications, wherever we need fast memory access CAM provides a provision. CAM is faster due to the arrangement of core cells that allows parallel access, it searches total memory array in single clock cycle. CAM plays a crucial role in network applications because of its parallel access. In this paper, we explored and described about CAM architectures based on N-type, P-type and TG-type comparison circuitry. For faster memory search, we used a latch-type match-line (ML) sensing scheme. Search operations and results of the CAM designs have been verified using a 45-nm CMOS process at 27°C with 1 V supply in SPECTRE simulator. Based on the post-layout results of 32×32-bit arrays, the P-CAM provides the best performance comparatively.