GB889977A - Improvements in or relating to matrix memory storage devices - Google Patents
Improvements in or relating to matrix memory storage devicesInfo
- Publication number
- GB889977A GB889977A GB2975758A GB2975758A GB889977A GB 889977 A GB889977 A GB 889977A GB 2975758 A GB2975758 A GB 2975758A GB 2975758 A GB2975758 A GB 2975758A GB 889977 A GB889977 A GB 889977A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulse
- pulses
- conductor
- read
- strength
- 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
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
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/06—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using single-aperture storage elements, e.g. ring core; using multi-aperture plates in which each individual aperture forms a storage element
- G11C11/06007—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using single-aperture storage elements, e.g. ring core; using multi-aperture plates in which each individual aperture forms a storage element using a single aperture or single magnetic closed circuit
- G11C11/06014—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using single-aperture storage elements, e.g. ring core; using multi-aperture plates in which each individual aperture forms a storage element using a single aperture or single magnetic closed circuit using one such element per bit
- G11C11/06021—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using single-aperture storage elements, e.g. ring core; using multi-aperture plates in which each individual aperture forms a storage element using a single aperture or single magnetic closed circuit using one such element per bit with destructive read-out
- G11C11/06028—Matrixes
- G11C11/06042—"word"-organised, e.g. 2D organisation or linear selection, i.e. full current selection through all the bit-cores of a word during reading
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Digital Magnetic Recording (AREA)
- Read Only Memory (AREA)
Abstract
889,977. Circuits employing bi-stable magnetic elements. PHILIPS ELECTRICAL INDUSTRIES Ltd. Sept. 17, 1958 [Sept. 20, 1957], No. 29757/58. Class 40 (9). [Also in Group XIX] In a matrix store comprising magnetic elements each coupled with a conductor of a first group and a conductor of a second group, in which binary information is written by applying coincident current pulses of approximately the same strength to a conductor in each group, and the information stored in elements coupled with the same first group conductor is read out by applying a current pulse of opposite polarity to this conductor, the strength of the read-out pulses is at least a factor 1-2 higher than the combined strength of the writing pulses fed to the two conductors. In the matrix shown in Fig. 1, a " 1 " is written in one of the cores K 11 -K 44 by applying pulses of amplitude PS2, Fig. 2, simultaneously to the appropriate row conductors H1-H4 and column conductors V1-V4. The selected core thus receives a pulse strength 2PS2 which drives it to positive remanence state P2; when a negative read-out pulse NS (larger than 2PS2) is applied to the associated row conductor, the core is returned to negative remanence state N1 and an output pulse proportional to the distance between P2 and N1 is applied to the associated read-out amplifiers UV1 . . . UV4. Those cores which have received only a half-write pulse PS2 will have been driven to state N3 which is very close to N1 so that they will provide a negligible output pulse in response to pulse NS. Where the core hysteresis loop is not perfectly rectangular, as indicated, this provides an improvement on the known system in which the strength of two half-write pulses (PS1) equals the strength of the read-out pulse NS. The pulses for the row conductors are obtained from switching cores SK1-SK4 in one direction or the other, the larger read-out pulses being obtained owing to the shunting of resistors R2 by rectifiers G.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL220969 | 1957-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB889977A true GB889977A (en) | 1962-02-21 |
Family
ID=19750980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2975758A Expired GB889977A (en) | 1957-09-20 | 1958-09-17 | Improvements in or relating to matrix memory storage devices |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH368525A (en) |
| DE (1) | DE1100346B (en) |
| FR (1) | FR1203350A (en) |
| GB (1) | GB889977A (en) |
| NL (1) | NL220969A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3274570A (en) * | 1961-09-22 | 1966-09-20 | Sperry Rand Corp | Time-limited switching for wordorganized memory |
-
0
- NL NL220969D patent/NL220969A/xx unknown
-
1958
- 1958-09-16 DE DEN15586A patent/DE1100346B/en active Pending
- 1958-09-17 GB GB2975758A patent/GB889977A/en not_active Expired
- 1958-09-17 CH CH6405358A patent/CH368525A/en unknown
- 1958-09-18 FR FR1203350D patent/FR1203350A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3274570A (en) * | 1961-09-22 | 1966-09-20 | Sperry Rand Corp | Time-limited switching for wordorganized memory |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1203350A (en) | 1960-01-18 |
| NL220969A (en) | |
| DE1100346B (en) | 1961-02-23 |
| CH368525A (en) | 1963-04-15 |
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