US3619636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic domain logic circuit
Assignee: AT&T Inc
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Filing: 1970-06-01
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Granted: 1971-11-09
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Expires: 1990-06-01
Abstract
Abstract A multiple input magnetic domain OR circuit is described. The circuit is defined in a sheet of material in which single wall domains can be moved by changing magnetic pole patterns in a magnetically soft overlay. The overlay includes a common element which serves as a terminus for a number of domain shift registers. The element is structured to accept only a single domain for providing an output.
Inventors
- 👤 Woo Foung Chow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:59
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0883; H; H03; H03K; H03K19/00; H03K19/02; H03K19/16; H03K19/168
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
117 words
A magnetic domain logic arrangement comprising a sheet of material in which single wall domains can be moved, means for defining a plurality of propagation channels in said sheet for said domains, said last-mentioned means comprising magnetically soft overlay elements having a geometry and being disposed for exhibiting domain-attracting pole patterns which change in response to a reorienting in-plane field for moving domain patterns therealong, said arrangement also including an overlay element having a first portion disposed to accept domains from all of said channels and having a geometry to exhibit domain attracting poles over said entire first portion when said inplane field is in an orientation to move domains from said channels to said first portion.
Claim 2
Dependent Claim
117 words
A magnetic domain logic arrangement comprising a sheet of material in which single wall domains can be moved, means for defining a plurality of propagation channels in said sheet for said domains, said last-mentioned means comprising magnetically soft overlay elements having a geometry and being disposed for exhibiting domain-attracting pole patterns which change in response to a reorienting in-plane field for moving domain patterns therealong, said arrangement also including an overlay element having a first portion disposed to accept domains from all of said channels and having a geometry to exhibit domain attracting poles over said entire first portion when said inplane field is in an orientation to move domains from said channels to said first portion.
Claim 3
Dependent Claim
25 words
An arrangement in accordance with claim 1 wherein said overlay element having said first portion is an elongated magnetically soft element including an output position.
Claim 4
Dependent Claim
32 words
An arrangement in accordance with claim 2 including a plurality of magnetically soft overlay elements for moving domains from said output position to a detector in response to said reorienting in-plane field.
Claim 5
Dependent Claim
48 words
An arrangement in accordance with claim 3 wherein said means for defining a plurality of channels comprises T-shaped and bar overlay elements disposed with respect to one another to move domain patterns therein in response to a rotating in-plane field, and means for providing said rotating in-plane field.
Claim 6
Dependent Claim
29 words
An arrangement in accordance with claim 4 including means for annihilating a domain coupled to said overlay element having said first portion for each rotation of said in-plane field.
Claim 7
Dependent Claim
36 words
An arrangement in accordance with claim 5 wherein said last-mentioned means comprises a conductor for generating in Said sheet at the periphery of said element having said first portion a field to collapse a domain there.
Claim 8
Dependent Claim
101 words
A magnetic domain logic circuit comprising a sheet of material in which single wall domains can be moved, a magnetically soft overlay of a geometry to define a plurality of domain propagating channels in said material, each having a terminus, a reorienting in-plane magnetic field for moving domains in said channels, a magnetically soft overlay of a geometry and disposed at said termini for forming at the periphery thereof a single domain if a domain is present at any one of said termini, means for detecting said single domain, and means for eliminating domains at the periphery of said elongated element.
Claim 9
Dependent Claim
101 words
A magnetic domain logic circuit comprising a sheet of material in which single wall domains can be moved, a magnetically soft overlay of a geometry to define a plurality of domain propagating channels in said material, each having a terminus, a reorienting in-plane magnetic field for moving domains in said channels, a magnetically soft overlay of a geometry and disposed at said termini for forming at the periphery thereof a single domain if a domain is present at any one of said termini, means for detecting said single domain, and means for eliminating domains at the periphery of said elongated element.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |