Structure and method of an encoded ternary content addressable memory (CAM) cell for low-power compare operation
US6288922A · kind A · utility
34Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2000 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Aug 11, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C15/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention discloses a low-power ternary CAM by utilizing four encoded comparand datalines, C0, C1, C2, and C3 in a twin ternary cell. The twin ternary cell is a composite of two ternary CAM bits. The two binary CAM bits are coded so that only one of four comparand datalines is toggled during a compare operation. The encoded data is stored and used for comparison. In one embodiment, the four possible states for the 2 bit comparands are coded as 0001, 0010, 0100, and 1000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.