GB2108738A - Arrangement for automatic erasing of the information contents in data bases - Google Patents
Arrangement for automatic erasing of the information contents in data basesInfo
- Publication number
- GB2108738A GB2108738A GB08237053A GB8237053A GB2108738A GB 2108738 A GB2108738 A GB 2108738A GB 08237053 A GB08237053 A GB 08237053A GB 8237053 A GB8237053 A GB 8237053A GB 2108738 A GB2108738 A GB 2108738A
- Authority
- GB
- United Kingdom
- Prior art keywords
- memory
- generators
- group
- memories
- erasing
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/20—Memory cell initialisation circuits, e.g. when powering up or down, memory clear, latent image memory
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/24—Memory cell safety or protection circuits, e.g. arrangements for preventing inadvertent reading or writing; Status cells; Test cells
Abstract
Arrangement to destroy by erasing the information contents in data memories and program memories included in a data base installation, without destroying the equipment. An operation device (MO) is brought to activate a first group of parallelly working address generators (AD1-ADn), these generators successively generating and selecting all addresses in a memory (DS1-DSn) which is separately connected to each of the generators and which is part of a first memory group. Gate circuits (GD1<u1>u-GDn<u4>u) are connected to the data inputs on each memory unit in this first memory group through which binary digits of the same logical level is written into the selected addresses of the memories irrespective of what is already written there. The operation device (MO) also activates a second group of parallelly working address generators (AP1-APn), these generators successively generating and selecting all addresses in a memory (PS1-PSn) which is separately connected to each of the generators, said memory being part of a second memory group. Gate circuits (GP<u1>u-GPn<u4>u) are connected to the data inputs of each memory unit in this second memory group through which circuits binary digits of the same logical level are written into the selected addresses of the memories. After completed erasing in said first and second memory group an activation signal is transmitted to a control device (L) which then indicates that the erasing is finished.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8009141A SE425705B (en) | 1980-12-23 | 1980-12-23 | DEVICE FOR AUTOMATICALLY ENHANCING THE INFORMATION CONTENT IN THE COMPUTER AND THE PROGRAMMING IN A DATABASE |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2108738A true GB2108738A (en) | 1983-05-18 |
GB2108738B GB2108738B (en) | 1985-04-24 |
Family
ID=20342579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08237053A Expired GB2108738B (en) | 1980-12-23 | 1981-12-21 | Arrangement for automatic erasing of the information contents in data bases |
Country Status (7)
Country | Link |
---|---|
ES (1) | ES508252A0 (en) |
GB (1) | GB2108738B (en) |
IT (1) | IT8125766A0 (en) |
NL (1) | NL8120486A (en) |
NO (1) | NO822813L (en) |
SE (1) | SE425705B (en) |
WO (1) | WO1982002274A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3347483A1 (en) * | 1983-12-29 | 1985-07-11 | GAO Gesellschaft für Automation und Organisation mbH, 8000 München | DEVICE FOR SECURING SECRET INFORMATION |
US4587629A (en) * | 1983-12-30 | 1986-05-06 | International Business Machines Corporation | Random address memory with fast clear |
US4593384A (en) * | 1984-12-21 | 1986-06-03 | Ncr Corporation | Security device for the secure storage of sensitive data |
US4698750A (en) * | 1984-12-27 | 1987-10-06 | Motorola, Inc. | Security for integrated circuit microcomputer with EEPROM |
US4860351A (en) * | 1986-11-05 | 1989-08-22 | Ibm Corporation | Tamper-resistant packaging for protection of information stored in electronic circuitry |
US4890263A (en) * | 1988-05-31 | 1989-12-26 | Dallas Semiconductor Corporation | RAM with capability for rapid clearing of data from memory by simultaneously selecting all row lines |
US5036488A (en) * | 1989-03-24 | 1991-07-30 | David Motarjemi | Automatic programming and erasing device for electrically erasable programmable read-only memories |
FR2659166A1 (en) * | 1990-03-05 | 1991-09-06 | Sgs Thomson Microelectronics | MEMORY CIRCUIT WITH MEMORY ELEMENT FOR SELECTING WORD LINES FOR ERASING AN INFORMATION BLOCK. |
DE19612440C1 (en) * | 1996-03-28 | 1997-05-07 | Siemens Ag | Control circuit e.g. for individual register of semiconductor memory on microprocessor chip |
GB2321123B (en) * | 1997-01-11 | 2001-01-03 | Motorola Ltd | Circuit for erasing a memory and a method thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4006433A (en) * | 1975-03-17 | 1977-02-01 | International Business Machines Corporation | Bias/erase oscillator |
US4172291A (en) * | 1978-08-07 | 1979-10-23 | Fairchild Camera And Instrument Corp. | Preset circuit for information storage devices |
-
1980
- 1980-12-23 SE SE8009141A patent/SE425705B/en unknown
-
1981
- 1981-12-21 GB GB08237053A patent/GB2108738B/en not_active Expired
- 1981-12-21 WO PCT/SE1981/000385 patent/WO1982002274A1/en unknown
- 1981-12-21 NL NL8120486A patent/NL8120486A/en unknown
- 1981-12-22 ES ES508252A patent/ES508252A0/en active Granted
- 1981-12-22 IT IT8125766A patent/IT8125766A0/en unknown
-
1982
- 1982-08-18 NO NO822813A patent/NO822813L/en unknown
Also Published As
Publication number | Publication date |
---|---|
NL8120486A (en) | 1983-04-05 |
GB2108738B (en) | 1985-04-24 |
IT8125766A0 (en) | 1981-12-22 |
ES8302944A1 (en) | 1982-12-01 |
ES508252A0 (en) | 1982-12-01 |
SE425705B (en) | 1982-10-25 |
NO822813L (en) | 1982-08-18 |
SE8009141L (en) | 1982-06-24 |
WO1982002274A1 (en) | 1982-07-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |