Global Patent Index - EP 1032938 A1

EP 1032938 A1 2000-09-06 - MEMORY APPARATUS INCLUDING PROGRAMMABLE NON-VOLATILE MULTI-BIT MEMORY CELL, AND APPARATUS AND METHOD FOR DEMARCATING MEMORY STATES OF THE CELL

Title (en)

MEMORY APPARATUS INCLUDING PROGRAMMABLE NON-VOLATILE MULTI-BIT MEMORY CELL, AND APPARATUS AND METHOD FOR DEMARCATING MEMORY STATES OF THE CELL

Title (de)

SPEICHERVORRICHTUNG MIT PROGRAMMIERBARER NICHT-FLÜCHTIGER MULTI-BIT-SPEICHERZELLE SOWIE VORRICHTUNG UND VERFAHREN ZUR SPEICHERZUSTANDSABGRENZUNG DER ZELLE

Title (fr)

DISPOSITIF MEMOIRE COMPORTANT DES CELLULES DE MEMOIRE MULTI-BITS, NON VOLATILE, PROGRAMMABLE, ET APPAREIL ET PROCEDE PERMETTANT DE DELIMITER LES ETATS DE MEMOIRE D'UNE CELLULE

Publication

EP 1032938 A1 (EN)

Application

EP 97952391 A

Priority

  • US 9722809 W
  • US 97591997 A

Abstract (en)

[origin: WO9927539A1] Memory states of a multi-bit memory cell are demarcated by generating read reference signals having levels that constitute boundaries of the memory states. The read reference signals are dependent upon the levels of programming reference signals used for controlling the programming of the memory cell. The memory cell can thus be programmed without reading out its memory state during the programming process, with programming margins being assured by the dependence of the read reference signals on the programming reference signals. Both sets of reference signals may be generated by reference cells which track variations in the operating characteristics of the memory cell with changes in conditions, such as temperature and system voltages, to enhance the reliability of memory programming and readout.

IPC 1-7 (main, further and additional classification)

G11C 11/56

IPC 8 full level (invention and additional information)

G11C 16/06 (2006.01); G11C 11/56 (2006.01); G11C 16/02 (2006.01); G11C 16/04 (2006.01)

CPC (invention and additional information)

G11C 11/5621 (2013.01); G11C 11/5628 (2013.01); G11C 11/5642 (2013.01); G11C 16/16 (2013.01); G11C 16/32 (2013.01); G11C 2211/5634 (2013.01); G11C 2211/5642 (2013.01)

Citation (search report)

See references of WO 9927539A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9927539 A1 19990603; AT 336069 T 20060915; AU 5600998 A 19990615; DE 69736493 D1 20060921; DE 69736493 T2 20070329; EP 1032938 A1 20000906; EP 2273507 A2 20110112; EP 2273507 A3 20120111; JP 2001524732 A 20011204; JP 2003030995 A 20030131; JP 3693915 B2 20050914; JP 3735082 B2 20060111

INPADOC legal status


2003-08-06 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030130

2002-09-04 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020719

2000-09-06 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000620

2000-09-06 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE