| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a system for utilizing dynamic reference by a two-bit cell memory. <P>SOLUTION: This invention provides a method of reading and identifying a two-bit core cell in a memory device. A memory device has a dynamic reference cell and a fixed reference cell. The method comprises a step of programming the dynamic reference cell using the fixed reference cell, and a step of programming the two-bit core cell using the dynamic reference cell. When the dynamic reference cell is provided on the same word line with a core cell, the constant current source applied to a core cell data line operates during program verification, so that the difference of current is provided between the core cell and the dynamic reference cell. <P>COPYRIGHT: (C)2004,JPO</p> |
