GB2239539B - Method of refreshing memory devices - Google Patents

Method of refreshing memory devices

Info

Publication number
GB2239539B
GB2239539B GB8926119A GB8926119A GB2239539B GB 2239539 B GB2239539 B GB 2239539B GB 8926119 A GB8926119 A GB 8926119A GB 8926119 A GB8926119 A GB 8926119A GB 2239539 B GB2239539 B GB 2239539B
Authority
GB
United Kingdom
Prior art keywords
memory devices
refreshing memory
refreshing
devices
memory
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
GB8926119A
Other versions
GB2239539A (en
GB8926119D0 (en
Inventor
Martin Jackson
David Wheeler
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.)
ACTIVE BOOK CO Ltd
EO COMPUTER Ltd
EO EUROP Ltd
EO Europe Ltd
Original Assignee
ACTIVE BOOK CO Ltd
EO COMPUTER Ltd
EO EUROP Ltd
EO Europe Ltd
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 ACTIVE BOOK CO Ltd, EO COMPUTER Ltd, EO EUROP Ltd, EO Europe Ltd filed Critical ACTIVE BOOK CO Ltd
Priority to GB8926119A priority Critical patent/GB2239539B/en
Publication of GB8926119D0 publication Critical patent/GB8926119D0/en
Priority to PCT/GB1990/001757 priority patent/WO1991007756A1/en
Priority to EP19900917039 priority patent/EP0500696A1/en
Priority to AU67412/90A priority patent/AU6741290A/en
Priority to JP51580290A priority patent/JPH05501628A/en
Publication of GB2239539A publication Critical patent/GB2239539A/en
Application granted granted Critical
Publication of GB2239539B publication Critical patent/GB2239539B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
    • G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
    • G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
    • G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
    • G11C11/406—Management or control of the refreshing or charge-regeneration cycles
    • G11C11/40626—Temperature related aspects of refresh operations
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
    • G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
    • G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
    • G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
    • G11C11/406—Management or control of the refreshing or charge-regeneration cycles

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Dram (AREA)
GB8926119A 1989-11-18 1989-11-18 Method of refreshing memory devices Expired - Fee Related GB2239539B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB8926119A GB2239539B (en) 1989-11-18 1989-11-18 Method of refreshing memory devices
PCT/GB1990/001757 WO1991007756A1 (en) 1989-11-18 1990-11-14 Method of refreshing memory devices
EP19900917039 EP0500696A1 (en) 1989-11-18 1990-11-14 Method of refreshing memory devices
AU67412/90A AU6741290A (en) 1989-11-18 1990-11-14 Method of refreshing memory devices
JP51580290A JPH05501628A (en) 1989-11-18 1990-11-14 How to refresh memory devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8926119A GB2239539B (en) 1989-11-18 1989-11-18 Method of refreshing memory devices

Publications (3)

Publication Number Publication Date
GB8926119D0 GB8926119D0 (en) 1990-01-10
GB2239539A GB2239539A (en) 1991-07-03
GB2239539B true GB2239539B (en) 1994-05-18

Family

ID=10666541

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8926119A Expired - Fee Related GB2239539B (en) 1989-11-18 1989-11-18 Method of refreshing memory devices

Country Status (5)

Country Link
EP (1) EP0500696A1 (en)
JP (1) JPH05501628A (en)
AU (1) AU6741290A (en)
GB (1) GB2239539B (en)
WO (1) WO1991007756A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5157634A (en) * 1990-10-23 1992-10-20 International Business Machines Corporation Dram having extended refresh time
US6021076A (en) 1998-07-16 2000-02-01 Rambus Inc Apparatus and method for thermal regulation in memory subsystems
EP1647990B1 (en) 2003-01-29 2008-12-24 Stmicroelectronics SA Method for refreshing a dynamic RAM, and corresponding dynamic RAM device, in particular incorporated in a cellular mobile telephone
JP4237109B2 (en) * 2004-06-18 2009-03-11 エルピーダメモリ株式会社 Semiconductor memory device and refresh cycle control method
WO2014120228A1 (en) * 2013-01-31 2014-08-07 Hewlett-Packard Development Company Ram refresh rate
US10978136B2 (en) * 2019-07-18 2021-04-13 Apple Inc. Dynamic refresh rate control

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796998A (en) * 1971-09-07 1974-03-12 Texas Instruments Inc Mos dynamic memory
US4218764A (en) * 1978-10-03 1980-08-19 Matsushita Electric Industrial Co., Ltd. Non-volatile memory refresh control circuit
US4344155A (en) * 1979-12-31 1982-08-10 Compagnie Internationale Pour L'informatique Cii-Honeywell Bull (Societe Anonyme) Method of and apparatus for inscribing a control character in a memory

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4380812A (en) * 1980-04-25 1983-04-19 Data General Corporation Refresh and error detection and correction technique for a data processing system
US4453237A (en) * 1980-10-01 1984-06-05 Intel Corporation Multiple bit output dynamic random-access memory
JPS6061992A (en) * 1983-09-14 1985-04-09 Nec Corp Pseudo static memory
JPS63121197A (en) * 1986-11-07 1988-05-25 Fujitsu Ltd Semiconductor memory device
JPS6432489A (en) * 1987-07-27 1989-02-02 Matsushita Electronics Corp Memory device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796998A (en) * 1971-09-07 1974-03-12 Texas Instruments Inc Mos dynamic memory
US4218764A (en) * 1978-10-03 1980-08-19 Matsushita Electric Industrial Co., Ltd. Non-volatile memory refresh control circuit
US4344155A (en) * 1979-12-31 1982-08-10 Compagnie Internationale Pour L'informatique Cii-Honeywell Bull (Societe Anonyme) Method of and apparatus for inscribing a control character in a memory

Also Published As

Publication number Publication date
JPH05501628A (en) 1993-03-25
GB2239539A (en) 1991-07-03
GB8926119D0 (en) 1990-01-10
EP0500696A1 (en) 1992-09-02
WO1991007756A1 (en) 1991-05-30
AU6741290A (en) 1991-06-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940818