US3723716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single wall domain arrangement including fine-grained, field access pattern
Assignee: AT&T Inc
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Filing: 1971-07-08
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Granted: 1973-03-27
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Expires: 1991-07-08
Abstract
Abstract A single wall domain propagation arrangement is provided by a pattern of closely spaced magnetically soft elements which define a ''''fine-grained'''' propagation path between a plurality of inputs and outputs. The pattern permits movement of domains laterally across the path, an option exercised by the design of the pattern itself or by domain interaction. When lateral movement is employed, the output at which a domain occurs is a logical function of the input and a full adder operation may be realized.
Inventors
- 👤 A Bobeck
- 👤 H Scovil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:56
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/383; G06F7/385; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0883; H; H03; H03K; H03K17/00; H03K17/51; H03K17/80; H03K17/84; H03K19/00; H03K19/02; H03K19/16; H03K19/168
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
65 words
A magnetic domain propagation arrangement comprising a layer of material in which single wall domains can be moved, and a pattern of elements coupled to said layer for defining a plurality of multistage channels for moving domains having a first diameter therealong in response to a varying magnetic field, said elements having geometries and being spaced apart distances sufficiently small to permit lateral displacement therebetween.
Claim 2
Dependent Claim
65 words
A magnetic domain propagation arrangement comprising a layer of material in which single wall domains can be moved, and a pattern of elements coupled to said layer for defining a plurality of multistage channels for moving domains having a first diameter therealong in response to a varying magnetic field, said elements having geometries and being spaced apart distances sufficiently small to permit lateral displacement therebetween.
Claim 3
Dependent Claim
46 words
An arrangement in accordance with claim 1 wherein the ones of said elements which define like stages of said channels provide equally attracting poles for domains moving therealong in response to a reorienting in-planE field and the spacing between said elements is about said first diameter.
Claim 4
Dependent Claim
26 words
An arrangement in accordance with claim 2 wherein said elements for defining a plurality of adjacent channels comprise a chevron pattern for each of said stages.
Claim 5
Dependent Claim
34 words
An arrangement in accordance with claim 3 wherein said chevron pattern for each of said stages comprises V-shaped elements of a geometry to provide relatively high pole concentrations there for ones of said channels.
Claim 6
Dependent Claim
37 words
An arrangement in accordance with claim 3 wherein said chevron pattern for each of said stages comprises V-shaped elements spaced varying distances apart to provide relatively high pole concentrations in the channels where said spacings are small.
Claim 7
Dependent Claim
30 words
An arrangement in accordance with claim 5 wherein the elements of the central ones of said channels are spaced more closely together than are the remaining ones of said elements.
Claim 8
Dependent Claim
51 words
An arrangement in accordance with claim 6 wherein said channels include first and second input positions and first and second output positions disposed to first and second sides of said central ones of said channels, said arrangement including first and second means for introducing domains to first and second input positions.
Claim 9
Dependent Claim
49 words
An arrangement in accordance with claim 7 also including first and second means for detecting domains at said first and second output positions said arrangement also including a third output position coupled to said central ones of said channels and means for detecting domains at said third output position.
Claim 10
Dependent Claim
20 words
An arrangement in accordance with claim 8 including means for introducing domains selectively to a central one of said channels.
Claim 11
Dependent Claim
18 words
An arrangement in accordance with claim 3 including means for displacing domains laterally with respect to said channels.
Claim 12
Dependent Claim
27 words
An arrangement in accordance with claim 10 also including first means for detecting domains laterally displaced to a first side of said central one of said channels.
Claim 13
Dependent Claim
37 words
An arrangement in accordance with claim 11 wherein said means for displacing domains comprises a first electrical conductor coupled to said layer and responsive to an external signal for generating a magnetic field for so displacing domains.
Claim 14
Dependent Claim
76 words
An arrangement in accordance with claim 12 wherein said means for displacing also comprises a second electrical conductor coupled to said layer in a manner such that external first and second signals applied to said first and second conductors respectively generates in said layer a magnetic field proportioned to the difference between said first and second signals to displace a domain moving along said central one of said channels to said first means for detecting domains.
Claim 15
Dependent Claim
87 words
A magnetic domain propagation arrangement comprising a layer of material in which single wall domains can be moved, and a pattern of elements coupled to said layer for defining a multistage channel for moving therealong domains having a first size in response to a magnetic field reorienting in the plane of said layer, the elements for each of said stages being spaced apart distances smaller then about said first size and having geometries to provide like poles along a line transverse to the direction of domain movement.
Claim 16
Dependent Claim
87 words
A magnetic domain propagation arrangement comprising a layer of material in which single wall domains can be moved, and a pattern of elements coupled to said layer for defining a multistage channel for moving therealong domains having a first size in response to a magnetic field reorienting in the plane of said layer, the elements for each of said stages being spaced apart distances smaller then about said first size and having geometries to provide like poles along a line transverse to the direction of domain movement.
Claim 17
Dependent Claim
35 words
An arrangement in accordance with claim 14 wherein each of said stages is defined by two or more V-shaped elements spaced apart from one another along an axis transverse to said direction of domain movement.
Claim 18
Dependent Claim
14 words
An arrangement in accordance with claim 15 wherein said elements comprise magnetically soft material.
Claim 19
Dependent Claim
18 words
An arrangement in accordance with claim 16 also including means for maintaining said domains at a nominal diameter.
Claim 20
Dependent Claim
25 words
An arrangement in accordance with claim 16 wherein said V-shaped elements are arranged in adjacent groups wherein the elements of adjacent groups overlap one another.
Claim 21
Dependent Claim
67 words
A domain propagation arrangement comprising a layer of material in which single wall domains having a collapse diameter can be moved, and a repetitive patTern of elements coupled to said layer for defining a multistage channel for domains therein, each of said stages including a plurality of elements laterally spaced apart distances such that each of said domains is coupled to two or more of said elements.
Claim 22
Dependent Claim
67 words
A domain propagation arrangement comprising a layer of material in which single wall domains having a collapse diameter can be moved, and a repetitive patTern of elements coupled to said layer for defining a multistage channel for domains therein, each of said stages including a plurality of elements laterally spaced apart distances such that each of said domains is coupled to two or more of said elements.
Claim 23
Dependent Claim
57 words
An arrangement in accordance with claim 19 wherein said elements of each of said stages are responsive to a magnetic field reorienting in the plane of said layer to generate like pole patterns for moving said domains, and each of said domains is moved in response to changing pole patterns in two or more of said elements.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |