公开(公告)号：US20020159308A1

公开(公告)日：2002-10-31

申请号：US10062271

申请日：2002-02-01

Applicant: STMicroelectronics S.A.

Inventor： Richard Fournel ,  Leila Sedjai Aitouarab

IPC: G11C007/00

CPC classification number: G11C16/3431 ,  G11C16/3418

Abstract: Reference cells are refreshed in a non-volatile memory that includes a plurality of memory cells. A selected reference cell and a non-used memory cell are read simultaneously, and a signal read from the reference cell is compared to a signal read from the non-used memory cell. A refresh signal for refreshing the reference cell is supplied when the signal read therefrom is less than the signal read from the non-used memory cell.

Abstract translation: 参考单元在包括多个存储单元的非易失性存储器中刷新。 同时读取选择的参考单元和未使用的存储单元，并将从参考单元读取的信号与从未使用的存储单元读取的信号进行比较。 当从其读取的信号小于从未使用的存储单元读取的信号时，提供刷新参考单元的刷新信号。