CONTENT ADDRESSABLE MEMORY CELLS AND TERNARY CONTENT ADDRESSABLE MEMORY CELLS

摘要

An embodiment of the invention provides a binary CAM cell. The binary CAM cell includes a storage circuit, a first discharging circuit, and a second discharging circuit. The storage circuit is configured to provide a first stored bit and a second stored bit, which are complimentary bits of each other. The first discharging circuit is configured to either discharge or not discharge a match line according to the first stored bit provided by the storage circuit and a first searched bit provided by a first search line. The first discharging circuit includes a first PMOS transistor. The second discharging circuit is configured to either discharge or not discharge the match line according to the second stored bit provided by the storage circuit and a second searched bit provided by a second search line. The second discharging circuit includes a second PMOS transistor.