PURPOSE: To detect the number of disaccording contents address memory cells to reduce the power consumption for bit collating operation by comparing stored data and retrieval data with each other to detect the potential level of a coincidence line.
CONSTITUTION: When a storage part 70 of a CAM cell 60 is selected by a word line 1, given data is stored in this part 70, and a comparing part 80 compares stored data and retrieval data with each other, and the comparison result is stored in a capacity element 9 in the form of electric charge through a cut-off means 15. The means 15 cuts off a part of the charging/discharging path of the element 9 to prevent stored information electric charge from escaping to lines other than a coincidence line 3. When disaccord information is stored in the element 9, an electric charge migrating means 11 forms a charging/ discharging path between the element 9 and the coincidence line 3. Then, the means 11 migrates a certain quantity of electric charge between the element 9 and the coincidence line 3. Thus, the potential of the coincidence line 3 is changed by a certain potential by the element 9 where disaccord information is stored.
| JP3089249 | [Title of Invention] Associative memory device |
| JPS5542308 | SEMICONDUCTOR MEMORY UNIT |
KOBAYASHI TOSHIFUMI
MIHARA MASAAKI
