DE3761932D1 - Sicherheitseinrichtung fuer eprom. - Google Patents

Sicherheitseinrichtung fuer eprom.

Info

Publication number
DE3761932D1
DE3761932D1 DE8787401120T DE3761932T DE3761932D1 DE 3761932 D1 DE3761932 D1 DE 3761932D1 DE 8787401120 T DE8787401120 T DE 8787401120T DE 3761932 T DE3761932 T DE 3761932T DE 3761932 D1 DE3761932 D1 DE 3761932D1
Authority
DE
Germany
Prior art keywords
eprom
safety device
safety
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE8787401120T
Other languages
English (en)
Inventor
De Ferron Gerard Silvestre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thomson Composants Militaires et Spatiaux
Original Assignee
Thomson Composants Militaires et Spatiaux
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Composants Militaires et Spatiaux filed Critical Thomson Composants Militaires et Spatiaux
Application granted granted Critical
Publication of DE3761932D1 publication Critical patent/DE3761932D1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/22—Safety or protection circuits preventing unauthorised or accidental access to memory cells
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/26—Sensing or reading circuits; Data output circuits
    • G11C16/28—Sensing or reading circuits; Data output circuits using differential sensing or reference cells, e.g. dummy cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S257/00—Active solid-state devices, e.g. transistors, solid-state diodes
    • Y10S257/922—Active solid-state devices, e.g. transistors, solid-state diodes with means to prevent inspection of or tampering with an integrated circuit, e.g. "smart card", anti-tamper

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Read Only Memory (AREA)
  • Storage Device Security (AREA)
DE8787401120T 1986-05-23 1987-05-19 Sicherheitseinrichtung fuer eprom. Expired - Fee Related DE3761932D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8607386A FR2599176A1 (fr) 1986-05-23 1986-05-23 Memoire morte programmable electriquement

Publications (1)

Publication Number Publication Date
DE3761932D1 true DE3761932D1 (de) 1990-04-19

Family

ID=9335551

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787401120T Expired - Fee Related DE3761932D1 (de) 1986-05-23 1987-05-19 Sicherheitseinrichtung fuer eprom.

Country Status (5)

Country Link
US (1) US4811291A (de)
EP (1) EP0246965B1 (de)
JP (1) JPS6324429A (de)
DE (1) DE3761932D1 (de)
FR (1) FR2599176A1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1228822B (it) * 1989-03-23 1991-07-04 Sgs Thomson Microelectronics Cella di riferimento per la lettura di dispositivi di memoria eeprom.
DE69033438T2 (de) * 1989-04-13 2000-07-06 Sandisk Corp., Santa Clara Austausch von fehlerhaften Speicherzellen einer EEprommatritze
US7447069B1 (en) 1989-04-13 2008-11-04 Sandisk Corporation Flash EEprom system
US5287315A (en) * 1991-01-31 1994-02-15 Texas Instruments Incorporated Skewed reference to improve ones and zeros in EPROM arrays
KR930011000A (ko) * 1991-11-29 1993-06-23 김광호 이이피롬 장치
US5828601A (en) * 1993-12-01 1998-10-27 Advanced Micro Devices, Inc. Programmed reference
JPH08213572A (ja) * 1994-11-30 1996-08-20 Nkk Corp 不揮発性半導体装置およびその製造方法
US5684739A (en) * 1994-11-30 1997-11-04 Nkk Corporation Apparatus and method for determining current or voltage of a semiconductor device
JP2663248B2 (ja) * 1994-12-16 1997-10-15 有限会社理究 浄水器を兼ねた蒸水製造装置
US6005805A (en) * 1994-12-27 1999-12-21 Nkk Corporation Nonvolatile semiconductor device with a verify function
KR0145382B1 (ko) * 1995-03-21 1998-08-17 김주용 플래쉬 이이피롬셀의 문턱전압 자동 검증회로
GB2337619B (en) * 1995-03-21 2000-03-01 Hyundai Electronics Ind Threshold voltage verification circuit of a non-volatile memory cell and program and erasure verification method using the same
US6438666B2 (en) * 1997-09-26 2002-08-20 Hughes Electronics Corporation Method and apparatus for controlling access to confidential data by analyzing property inherent in data
US6069382A (en) * 1998-02-11 2000-05-30 Cypress Semiconductor Corp. Non-volatile memory cell having a high coupling ratio
EP1906413A1 (de) * 2006-09-29 2008-04-02 Koninklijke Philips Electronics N.V. Sichere Vorrichtung für nichtflüchtige Speicher und Verfahren zum Schutz der darin enthaltenen Daten

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5698790A (en) * 1980-01-09 1981-08-08 Nec Corp Nonvolatile memory device
US4453074A (en) * 1981-10-19 1984-06-05 American Express Company Protection system for intelligent cards
DE3205476A1 (de) * 1982-02-16 1983-08-25 Siemens AG, 1000 Berlin und 8000 München Wortweise elektrisch umprogrammierbarer nichtfluechtiger speicher sowie verwendung eines solchen speichers
US4683554A (en) * 1985-09-13 1987-07-28 Ncr Corporation Direct write nonvolatile memory cells

Also Published As

Publication number Publication date
EP0246965B1 (de) 1990-03-14
EP0246965A1 (de) 1987-11-25
US4811291A (en) 1989-03-07
FR2599176A1 (fr) 1987-11-27
JPS6324429A (ja) 1988-02-01

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee