GB1257857A - - Google Patents
Info
- Publication number
- GB1257857A GB1257857A GB1257857DA GB1257857A GB 1257857 A GB1257857 A GB 1257857A GB 1257857D A GB1257857D A GB 1257857DA GB 1257857 A GB1257857 A GB 1257857A
- Authority
- GB
- United Kingdom
- Prior art keywords
- domain
- channel
- rotating
- propagation
- magnetic
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
-
- 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
- G11C19/0808—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure using magnetic domain propagation
- G11C19/0816—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure using magnetic domain propagation using a rotating or alternating coplanar magnetic field
-
- 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
- G11C19/0858—Generating, replicating or annihilating magnetic domains (also comprising different types of magnetic domains, e.g. "Hard Bubbles")
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M12/00—Hybrid cells; Manufacture thereof
- H01M12/04—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/80—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices
- H03K17/84—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices the devices being thin-film devices
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Magnetic Heads (AREA)
- Burglar Alarm Systems (AREA)
- Mram Or Spin Memory Techniques (AREA)
- Hall/Mr Elements (AREA)
Abstract
1,257,857. Magnetic storage devices. WESTERN ELECTRIC CO. Inc. 27 Aug., 1969 [29 Aug., 1968], No. 42605/69. Heading H3B. In a magnetic device comprising a layer of magnetic material having associated therewith an overlay of magnetic material to define a single wall domain producing region and a domain propagation channel the arrangement is such that when an appropriate magnetic field rotating in the plane of the layer is applied a single wall domain is produced at the input of the channel and propagated therealong. In the arrangement of Fig. 1 the single wall domain producing region and propagation channel of sheet 11 are defined by a disc 15 and bar and T-shaped overlays 13, 14 of permalloy. When a rotating magnetic field H produced by orthogonal sets of coils B, B<SP>1</SP> is applied a permanent domain D provided in the layer 11 moves about the periphery of the disc as shown in Figs. 2-8, positive poles induced in the overlay by the magnetic field attracting the domain. The domain is stretched until as shown at Fig. 7 it is about to divide into two, then Fig. 8 the domain divides one following the bar and T and the other D<SP>1</SP> moving about the disc again. The rotating field also results in propagation of the domains along the channel to the output position coupled by conductors 19, 21, a pulse on conductor 19 resulting in a domain coupled thereto collapsing the domain and inducing a signal in conductor 21, the presence or absence of a domain indicating a "1" or "0". Since the field required for propagation is less than that required to divide the domain D the rotating magnetic field has its strength varied so that it is only increased when a domain is to be introduced and then only for the last quarter of the cycle. The overlays for a plurality of propagation channels may be provided on one side of the magnetic layer 11 and the respective input overlays each of different geometry e.g. rectangular, disc or cross-shaped on the other side, Fig. 9 (not shown). The amplitude of the rotating field thus determines the channel into which a domain is introduced. By providing a generalized pattern of overlays domains may be introduced and propagated in X and Y directions. Domains may be introduced into more than one channel from a given input overlay by increasing the amplitude of the rotating field during different quarter cycles, Figs. 10 to 13 (not shown). In a further arrangement three parallel bars of permalloy are used, Figs. 14, 15 (not shown) two of the bars being of low coercive force and the middle one of high coercive force.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US75621068A | 1968-08-29 | 1968-08-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1257857A true GB1257857A (en) | 1971-12-22 |
Family
ID=25042487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1257857D Expired GB1257857A (en) | 1968-08-29 | 1969-08-27 |
Country Status (8)
Country | Link |
---|---|
US (1) | US3555527A (en) |
BE (1) | BE738044A (en) |
DE (1) | DE1943287A1 (en) |
ES (1) | ES371265A1 (en) |
FR (1) | FR2016567A1 (en) |
GB (1) | GB1257857A (en) |
NL (1) | NL6913095A (en) |
SE (1) | SE343421B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3611331A (en) * | 1969-12-04 | 1971-10-05 | Bell Telephone Labor Inc | Single wall domain source |
US3633185A (en) * | 1970-05-22 | 1972-01-04 | Bell Telephone Labor Inc | Single-wall domain generator |
US3619636A (en) * | 1970-06-01 | 1971-11-09 | Bell Telephone Labor Inc | Magnetic domain logic circuit |
US3727197A (en) * | 1970-12-31 | 1973-04-10 | Ibm | Magnetic means for collapsing and splitting of cylindrical domains |
US3710356A (en) * | 1971-09-08 | 1973-01-09 | Bell Telephone Labor Inc | Strip domain propagation arrangement |
US4091458A (en) * | 1976-06-14 | 1978-05-23 | Rockwell International Corporation | Multiple chevron passive generator |
US4156937A (en) * | 1977-10-12 | 1979-05-29 | Control Data Corporation | Noncirculating register for bubble memory systems |
US4272817A (en) * | 1979-04-02 | 1981-06-09 | Intel Magnetics, Inc. | Multiplexed single wall domain generators |
US4262070A (en) * | 1980-04-18 | 1981-04-14 | Liu Hua Kuang | Method of making halftone contact screens |
-
1968
- 1968-08-29 US US756210A patent/US3555527A/en not_active Expired - Lifetime
-
1969
- 1969-08-21 SE SE11620/69A patent/SE343421B/xx unknown
- 1969-08-25 FR FR6929066A patent/FR2016567A1/fr not_active Withdrawn
- 1969-08-26 DE DE19691943287 patent/DE1943287A1/en active Pending
- 1969-08-27 GB GB1257857D patent/GB1257857A/en not_active Expired
- 1969-08-27 NL NL6913095A patent/NL6913095A/xx unknown
- 1969-08-27 BE BE738044D patent/BE738044A/xx unknown
- 1969-08-28 ES ES371265A patent/ES371265A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3555527A (en) | 1971-01-12 |
BE738044A (en) | 1970-02-02 |
FR2016567A1 (en) | 1970-05-08 |
DE1943287A1 (en) | 1970-03-05 |
SE343421B (en) | 1972-03-06 |
NL6913095A (en) | 1970-03-03 |
ES371265A1 (en) | 1972-03-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees | ||
PLNP | Patent lapsed through nonpayment of renewal fees |