Memory device storing data in ternary cells using two levels of coding

Abstract

Systems, methods, and apparatus related to memory devices that store data. In one approach, a memory device includes at least one memory array having ternary memory cells. A controller stores data in pairs of the ternary cells. Each value in the data is stored by writing a respective pair of cells using a first level of coding. The controller defines a special value and identifies instances of the special value in the data. An additional bit is stored for each identified special value using a second level of coding.

Dependencies are inferred from the claim text.