Patent US4293428A successfully refreshed from Google Patents.
US3689751A
Expired / Lapsed
US
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Single wall domain logic arrangement
Assignee: AT&T Inc
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Filing: 1970-11-02
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Granted: 1972-09-05
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Expires: 1990-11-02
Abstract
Abstract A serial full adder is defined by a magnetically soft overlay pattern in a slice of magnetic material in which single wall domains can be moved. The overlay defines a unique intersection between two input and one output domain propagation channels which carries out the carry function in response to the reorienting in-plane field which effects domain movement in the channels.
Inventors
- 👤 Woo Foung Chow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:02
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/383; G06F7/385; H; H03; H03K; H03K19/00; H03K19/02; H03K19/16; H03K19/168
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
A domain propagation arrangement comprising a slice of material in which single wall domains can be moved, and a magnetically soft overlay juxtaposed with a surface of said slice for defining a first input domain propagation channel including an auxiliary recirculating loop for a domain and an output position, said overlay having a geometry at said recirculating loop to recirculate a domain only once thereabout in the absence of a control domain which inhibits movement of the recirculating domain to said output position, said domain in said loop being recirculated in response to a reorienting in-plane field, and second means for selectively diverting a domain from said first channel into said loop.
Claim 2
Dependent Claim
112 words
A domain propagation arrangement comprising a slice of material in which single wall domains can be moved, and a magnetically soft overlay juxtaposed with a surface of said slice for defining a first input domain propagation channel including an auxiliary recirculating loop for a domain and an output position, said overlay having a geometry at said recirculating loop to recirculate a domain only once thereabout in the absence of a control domain which inhibits movement of the recirculating domain to said output position, said domain in said loop being recirculated in response to a reorienting in-plane field, and second means for selectively diverting a domain from said first channel into said loop.
Claim 3
Dependent Claim
53 words
A domain propagation arrangement in accordance with claim 1 wherein said overlay also defines a second input propagation channel, said second channel intersecting said first channel such that a domain moving synchronously along said second channel is operative as said second means to divert a domain in said first channel to said loop.
Claim 4
Dependent Claim
70 words
A domain propagation arrangement in accordance with claim 2 wherein said overlay has a geometry such that a domain moving along said first input channel in the presence of a domain synchronously circulating in each of said second channel and said loop moves to said output position and is operative as said control domain to force said recirculating domain to recirculate once again thereabout in response to said in-plane fielD.
Claim 5
Dependent Claim
91 words
A domain propagation serial full adder comprising a slice of material in which single wall domains can be moved, a magnetically soft overlay juxtaposed with said slice for moving domains therein in response to a reorienting in-plane field, said overlay having a geometry to define first and second input channels and a first output channel having a common intersection, said overlay at said intersection having a geometry for defining an auxiliary recirculating loop for recirculating for only one cycle of said in-plane field any domain diverted thereto from said first channel.
Claim 6
Dependent Claim
91 words
A domain propagation serial full adder comprising a slice of material in which single wall domains can be moved, a magnetically soft overlay juxtaposed with said slice for moving domains therein in response to a reorienting in-plane field, said overlay having a geometry to define first and second input channels and a first output channel having a common intersection, said overlay at said intersection having a geometry for defining an auxiliary recirculating loop for recirculating for only one cycle of said in-plane field any domain diverted thereto from said first channel.
Claim 7
Dependent Claim
41 words
A serial full adder in accordance with claim 4 wherein said overlay at said intersection also has a geometry for diverting domains moving synchronously along said first and second input channels to said recirculating loop and to a domain annihilator respectively.
Claim 8
Dependent Claim
53 words
A serial full adder in accordance with claim 5 wherein said overlay at said intersection has a geometry to pass a domain in either of said first or second input channels to said output channel in the absence of a domain moving synchronously along the other of said first or second input channels.
Claim 9
Dependent Claim
48 words
A serial full added in accordance with claim 6 wherein said overlay at said intersection also has a geometry to pass a domain in said first input channel to said output channel in the presence of domains moving synchronously in said second channel and in said recirculating loop.
Claim 10
Dependent Claim
24 words
A serial full adder in accordance with claim 7 wherein said in-plane field reorients by rotation, and means for providing said rotating in-plane field.
References Cited (Backward Citations)
US3541522A
Cited
US3518643A
Cited
US3534347A
Cited
US3530446A
Cited
US3543252A
Cited
US3541535A
Cited
US3618054A
Cited
US3619636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |