US3786446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single wall domain coding circuit
Assignee: AT&T Inc
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Filing: 1972-09-12
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Granted: 1974-01-15
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Expires: 1992-09-12
Abstract
Abstract A number of field access, magnetic bubble propagation channels are connected to a single magneto-resistance detector by a binary coded interconnection circuit. The circuit is operative to retard bubbles in ones of the channels with respect to others while laterally expanding those which are not retarded. The latter provide improved signal levels.
Inventors
- 👤 P Bonyhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:20
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0883; G11C19/0866
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
179 words
Apparatus comprising a layer of material in which single wall domains can be moved, means for defining in said layer a plurality of channels for the movement of said domains, and expansion means operative to move a domain from a selected one of said plurality of channels from an output position in each of said channels along an axis to a detection position, said lastmentioned means comprising a pattern of magnetic elements extending between each of said output positions and said detection position and defining a plurality of stages therebetween for the movement of said domains in response to a magnetic field reorienting in the plane of said layer, and a plurality of electrical conductors coupled to said layer in a coded arrangement such that each of said conductors is associated with two of said stages for retarding coded ones of said domains being moved along said axis, said conductors being operative responsive to external signals to retard coded ones of said domains, said pattern being operative to expand laterally with respect to said axis domains not so retarded.
Claim 2
Dependent Claim
179 words
Apparatus comprising a layer of material in which single wall domains can be moved, means for defining in said layer a plurality of channels for the movement of said domains, and expansion means operative to move a domain from a selected one of said plurality of channels from an output position in each of said channels along an axis to a detection position, said lastmentioned means comprising a pattern of magnetic elements extending between each of said output positions and said detection position and defining a plurality of stages therebetween for the movement of said domains in response to a magnetic field reorienting in the plane of said layer, and a plurality of electrical conductors coupled to said layer in a coded arrangement such that each of said conductors is associated with two of said stages for retarding coded ones of said domains being moved along said axis, said conductors being operative responsive to external signals to retard coded ones of said domains, said pattern being operative to expand laterally with respect to said axis domains not so retarded.
Claim 3
Dependent Claim
22 words
Apparatus in accordance with claim 1 wherein said pattern is fine-grained and said coded arrangement is organized in a binary coded fashion.
Claim 4
Dependent Claim
19 words
Apparatus in accordance with claim 2 wherein each of said conductors is associated with a pair of consecutive stages.
Claim 5
Dependent Claim
25 words
Apparatus in accordance with claim 3 wherein said stages include increasing numbers of said magnetic elements responsive to said reorienting field to expand said domain.
Claim 6
Dependent Claim
27 words
Apparatus in accordance with claim 4 wherein coded ones of said elements in said stages are omitted for limiting the extent of lateral expansion of domains therein.
Claim 7
Dependent Claim
100 words
Apparatus comprising a layer of material in which single wall domains can be moved, means for defining in said layer a multistage channel for moving said domains along an axis from an input to an output stage in response to a reorienting in-plane field, each of said stages comprising a fine-grained pattern of elements arranged laterally with respect to said axis, and a plurality of electrical conductors each coupled to a pair of consecutive ones of said stages in a coded manner, said conductors being operative when pulseD to retard domains being advanced there-across in response to said in-plane field.
Claim 8
Dependent Claim
100 words
Apparatus comprising a layer of material in which single wall domains can be moved, means for defining in said layer a multistage channel for moving said domains along an axis from an input to an output stage in response to a reorienting in-plane field, each of said stages comprising a fine-grained pattern of elements arranged laterally with respect to said axis, and a plurality of electrical conductors each coupled to a pair of consecutive ones of said stages in a coded manner, said conductors being operative when pulseD to retard domains being advanced there-across in response to said in-plane field.
Claim 9
Dependent Claim
21 words
Apparatus in accordance with claim 6 in which said input stage is adapted to receive a plurality of domains in parallel.
Claim 10
Dependent Claim
27 words
Apparatus in accordance with claim 7 wherein each of said conductors is coupled to a pair of consecutive ones of said stages in a binary coded manner.
Claim 11
Dependent Claim
27 words
Apparatus in accordance with claim 7 wherein coded ones of said elements in said stages are omitted for limiting the extent of lateral expansion of domains therein.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |