GB1456774A - Magnetic memories - Google Patents
Magnetic memoriesInfo
- Publication number
- GB1456774A GB1456774A GB4716374A GB4716374A GB1456774A GB 1456774 A GB1456774 A GB 1456774A GB 4716374 A GB4716374 A GB 4716374A GB 4716374 A GB4716374 A GB 4716374A GB 1456774 A GB1456774 A GB 1456774A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bubbles
- conductor
- bars
- transferred
- current pulse
- 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
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
- G11C19/08—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure
- G11C19/0875—Organisation of a plurality of magnetic shift registers
- G11C19/0883—Means for switching magnetic domains from one path into another path, i.e. transfer switches, swap gates or decoders
Landscapes
- Thin Magnetic Films (AREA)
- Hall/Mr Elements (AREA)
Abstract
1456774 Magnetic bubble switching SPERRY RAND CORP 31 Oct 1974 [9 Nov 1973] 47163/74 Heading H3B In a magnetic memory bubbles are transferred between a major and plural minor loops by two magnetically soft linking elements D, E and a serpentine transfer conductor B which contacts once each soft magnetic element that it crosses. The bubbles are propagated by an in-plane rotating field H R which normally drives bubbles leftwards across T and I bars A-G forming part of the major loop but may be transferred to minor loops formed by H and I bars such as H-J by the application of a current pulse to the conductor when the field H R is between compass positions 3 and 4 to switch the bubbles to element D. Similarly, bubbles are switched back to the major loop by element E when a current pulse is applied at the time H R is between positions 1 and 2. The conductor is of gold electrodeposited directly over the elements.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US407675A US3896421A (en) | 1973-11-09 | 1973-11-09 | Bi-directional magnetic domain transfer circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1456774A true GB1456774A (en) | 1976-11-24 |
Family
ID=23613058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4716374A Expired GB1456774A (en) | 1973-11-09 | 1974-10-31 | Magnetic memories |
Country Status (6)
Country | Link |
---|---|
US (1) | US3896421A (en) |
JP (1) | JPS5821357B2 (en) |
DE (1) | DE2451535C3 (en) |
FR (1) | FR2251073B1 (en) |
GB (1) | GB1456774A (en) |
IT (1) | IT1022661B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4096582A (en) * | 1974-05-30 | 1978-06-20 | Monsanto Company | Field-accessed magnetic bubble mutually exclusive circuits with common elements |
JPS52142934A (en) * | 1976-05-21 | 1977-11-29 | Rockwell International Corp | Small exchange switch |
US4094005A (en) * | 1976-05-21 | 1978-06-06 | Rockwell International Corporation | Magnetic bubble data transfer switch |
US4225941A (en) * | 1978-10-30 | 1980-09-30 | Trw Inc. | Controller for bubble memories |
US4238377A (en) * | 1979-06-04 | 1980-12-09 | Chevron Research Company | Polymerizable premix composition for preparation of polyurethane surfaces |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3697963A (en) * | 1971-03-29 | 1972-10-10 | Bell Telephone Labor Inc | Single wall domain memory organization |
US3713116A (en) * | 1971-11-09 | 1973-01-23 | Bell Telephone Labor Inc | Single-wall domain arrangement |
BE792287A (en) * | 1971-12-06 | 1973-03-30 | Western Electric Co | MAGNETIC MEMORY DEVICE |
-
1973
- 1973-11-09 US US407675A patent/US3896421A/en not_active Expired - Lifetime
-
1974
- 1974-10-07 IT IT7428143A patent/IT1022661B/en active
- 1974-10-30 DE DE2451535A patent/DE2451535C3/en not_active Expired
- 1974-10-31 GB GB4716374A patent/GB1456774A/en not_active Expired
- 1974-11-05 FR FR7436682A patent/FR2251073B1/fr not_active Expired
- 1974-11-06 JP JP49127946A patent/JPS5821357B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2451535C3 (en) | 1981-04-16 |
JPS50114135A (en) | 1975-09-06 |
FR2251073B1 (en) | 1981-06-12 |
US3896421A (en) | 1975-07-22 |
JPS5821357B2 (en) | 1983-04-28 |
FR2251073A1 (en) | 1975-06-06 |
IT1022661B (en) | 1978-04-20 |
DE2451535B2 (en) | 1980-07-10 |
DE2451535A1 (en) | 1975-08-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |