Global Patent Index - EP 1356473 A1

EP 1356473 A1 20031029 - METHOD AND DEVICE FOR VERIFYING A GROUP OF NON-VOLATILE MEMORY CELLS

Title (en)

METHOD AND DEVICE FOR VERIFYING A GROUP OF NON-VOLATILE MEMORY CELLS

Title (de)

SCHALTUNG UND VERFAHREN ZUM TEST EINER GRUPPE NICHTFLÜCHTIGER SPEICHERZELLEN

Title (fr)

PROCEDE ET DISPOSITIF DE VERIFICATION D'UN GROUPE DE CELLULES DE MEMOIRE NON VOLATILE

Publication

EP 1356473 A1 20031029 (FR)

Application

EP 02701353 A 20020130

Priority

  • FR 0200361 W 20020130
  • FR 0101442 A 20010202

Abstract (en)

[origin: FR2820545A1] The invention relates to a method for the simultaneous verification of a first electrical state of a group of N cells from a non-volatile memory. The inventive method is characterised in that it comprises the following steps: the N memory cells (CE) to be verified and the verification cell (Cveri) are read and selected simultaneously; the N signals which are read are added together to produce a sum signal; the sum signal is compared to the signal which is read on the verification cell (Cveri) in order to provide a certain state signal when the sum signal is less than the signal which is read on the verification cell (Cveri), indicating that the N memory cells are in said electrical state, and another electrical state signal when the sum signal is greater than the signal which is read on the verification cell, indicating that at least one memory cell is not in said electrical state.

IPC 1-7

G11C 16/34; G11C 29/00

IPC 8 full level

G11C 16/34 (2006.01); G11C 29/34 (2006.01)

CPC (source: EP)

G11C 16/3436 (2013.01); G11C 29/34 (2013.01)

Citation (search report)

See references of WO 02063632A1

Designated contracting state (EPC)

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

DOCDB simple family (publication)

FR 2820545 A1 20020809; FR 2820545 B1 20030530; EP 1356473 A1 20031029; US 2003174556 A1 20030918; US 6778440 B2 20040817; WO 02063632 A1 20020815

DOCDB simple family (application)

FR 0101442 A 20010202; EP 02701353 A 20020130; FR 0200361 W 20020130; US 36323403 A 20030305