Patent ID: 7978490
Filing Date: 2011-07-12
Classification: G11C

Abstract:
1. A content addressable memory (CAM) cell included in a CAM that compares data stored therein to search data input thereto through a search line, the CAM cell comprising: a phase change memory device configured to store data, the phase change memory device having a resistance that is varied according to the logic level of the stored data; a developer configured to control reading data from the phase change memory device in a search mode in which the data stored in the phase change memory device is compared to the search data; and a connector including a gate connected to a wordline, a first terminal connected to at least one bit line and a second terminal connected to the phase change memory device, wherein a first terminal of the developer is connected to a bias voltage, a gate of the developer is connected to the search line and a second terminal of the developer is connected to the phase change memory and a comparator.