Magnetic domain logic apparatus

Claim 2

Magnetic domain logic apparatus including a sheet of material in which single wall magnetic domains can be moved and a magnetically soft overlay pattern juxtaposed with a surface of said sheet characterized in that said overlay pattern defines at least two logic cells, each of said cells including at least two closed interconnected domain recirculating loops, said overlay pattern being further arranged so that at least one but not all of said loops in a first of said cells passes in proximity to a branching interconnection of said loops in a second of said cells.

Claim 3

The apparatus defined in claim 1 further characterized in that a domain recirculating in said second cell propagates along a first loop in said second cell unless deflected into a second loop in said second cell at said branching interconnection by the presence of a domain recirculating in said first cell on said loop passing in proximity to said branching interconnection.

Claim 4

Magnetic domain logic apparatus including a sheet of material in which single wall magnetic domains can be moved and a magnetically soft overlay pattern juxtaposed with a surface of said sheet characterized in that said overlay pattern defines at least two logic cells between which cells information propagates by the selective interaction of domains, at least one of which is permanently stored within one of said cells.

Claim 5

Magnetic domain logic apparatus including a sheet of material in which single wall magnetic domains can be moved and a magnetically soft overlay pattern juxtaposed with a surface of said sheet characterized in that said overlay pattern defines at least two logic cells between which cells information propagates by the selective interaction of domains, at least one of which is permanently stored within one of said cells.

Claim 6

The apparatus defined in claim 3 further characterized in that the overlay pattern defining each of said cells further defines at least two closed interconnected domain recirculating loops. 5 Magnetic domain logic apparatus including a sheet of material in which single wall magnetic domains can be moved and a magnetically soft overlay pattern juxtaposed with a surface of said sheet characterized in that said overlay pattern defines a matrix of logic cells between which cells information propagates by the selective mutual repulsive interaction of domains, at least one of which is permanently stored within one of said cells.

Claim 7

The apparatus defined in claim 5 further characterized in that the overlay pattern defining each of said cells further defines at least two interconnected domain recirculating loops.

Claim 8

The apparatus defined in claim 6 further characterized in that each of said cells occupies an equilateral area in said overlay pattern.

Claim 9

The apparatus defined in claim 7 further characterized in that each of said cells has information propagating domain interaction points in common with adjacent cells at the midpoints of at least two of its sides.

Claim 10

The apparatus defined in claim 8 further characterized in that said recirculating loops in each of said cells branch in the vicinity of at least one of said information propagating domain interaction points.

Claim 11

The apparatus defined in claim 9 further characterized in that at least one of said recirculating loops in each of said cells passes near an information propagating domain interaction point while at least one other loop does not.

Claim 12

Magnetic domain logic apparatus including a sheet of material in which single wall magnetic domains can be moved, a magnetically soft overlay pattern juxtaposed with a surface of said sheet, and means for applying a reorienting magnetic field in the plane of said sheet characterized in that said overlay pattern defines a matrix of logic cells between which cells information propagates by the selective interaction of domains, at least one of which is permanently stored within one of said cells.

Claim 13

Magnetic domain logic apparatus including a sheet of material in which single wall magnetic domains can be moved, a magnetically soft overlay pattern juxtaposed with a surface of said sheet, and means for applying a reorienting magnetic field in the plane of said sheet characterized in that said overlay pattern defines a matrix of logic cells between which cells information propagates by the selective interaction of domains, at least one of which is permanently stored within one of said cells.

Claim 14

The apparatus defined in claim 11 further characterized in that the overlay pattern defining each of said cells further defines at least two interconnected domain recirculating loops.

Claim 15

The apparatus defined in claim 12 further characterized in that each of said cells occupies an equilateral area in said overlay pattern.

Claim 16

The apparatus defined in claim 13 further characterized in that each of said cells has information propagating domain interaction points in common with adjacent cells at the midpoints of at least two of its sides.

Claim 17

The apparatus defined in claim 14 further characterized in that said recirculating loops in each of said cells branch in the vicinity of at least one of said information propagating domain interaction points.

Claim 18

The apparatus defined in claim 15 further characterized in that said domain associated with each of said cells propagates along a first of said loops unless deflected into a second of said loops by interaction with a domain recirculating in an adjacent cell.

Claim 19

The apparatus defined in claim 16 further characterized in that at least one of said recirculating loops in each of said cells passes near an information propagating domain interaction point while at least one other loop does not.

Claim 20

Logic apparatus including a sheet of material in which single wall magnetic domains can be made to move comprising: first domain recirculating means for selectively propagating a first domain along first or second closed paths in said sheet; and second domain recirculating means for propagating a second domain along third or fourth closed paths in said sheet in response to the propagation of said first domain along said first or second paths, respectively.

Claim 21

Logic apparatus including a sheet of material in which single wall magnetic domains can be made to move comprising: first domain recirculating means for selectively propagating a first domain along first or second closed paths in said sheet; and second domain recirculating means for propagating a second domain along third or fourth closed paths in said sheet in response to the propagation of said first domain along said first or second paths, respectively.

Claim 22

The apparatus defined in claim 18 wherein said first and second domain recirculating means respectively comPrise first and second magnetically soft overlay patterns juxtaposed with a surface of said sheet.

Claim 23

Apparatus for performing binary logical operations by the propagation and interaction of magnetic domains in a magnetic domain medium comprising at least two logic cells, said cells being disposed so that binary information is transmitted between them by the mutual repulsion of domains synchronously recirculating in each of said cells, each of said cells further comprising at least two interconnected recirculating domain propagation loops, a domain propagating in a first of said loops in response to the application to said cell of binary information of a first kind and propagating in one of the remaining loops in response to the application of said cell of binary information of a second kind.

Claim 24

Apparatus for performing binary logical operations by the propagation and interaction of magnetic domains in a magnetic domain medium comprising at least two logic cells, said cells being disposed so that binary information is transmitted between them by the mutual repulsion of domains synchronously recirculating in each of said cells, each of said cells further comprising at least two interconnected recirculating domain propagation loops, a domain propagating in a first of said loops in response to the application to said cell of binary information of a first kind and propagating in one of the remaining loops in response to the application of said cell of binary information of a second kind.

Claim 25

Logic apparatus comprising a matrix of equilateral cells in a sheet of material in which single wall magnetic domains can be selectively propagated, each of said cells having potential domain interaction points in common with adjacent cells at the midpoints of at least two of its sides, each of said cells further comprising magnetic domain propagating means defining at least two interconnected domain recirculating loops, said loops branching in the vicinity of at least one of said potential interaction points and at least one but not all of said loops passing at least one of the remaining interaction points.

Claim 26

Logic apparatus comprising a matrix of equilateral cells in a sheet of material in which single wall magnetic domains can be selectively propagated, each of said cells having potential domain interaction points in common with adjacent cells at the midpoints of at least two of its sides, each of said cells further comprising magnetic domain propagating means defining at least two interconnected domain recirculating loops, said loops branching in the vicinity of at least one of said potential interaction points and at least one but not all of said loops passing at least one of the remaining interaction points.

Claim 27

The apparatus defined in claim 21 wherein said cells are square.

Claim 28

Magnetic domain logic apparatus including a sheet of material in which single wall magnetic domains can be moved, a magnetically soft overlay pattern juxtaposed with a surface of said sheet, and means for applying a reorienting magnetic field in the plane of said sheet characterized in that said overlay pattern defines a matrix of equilateral logic cells, each cell having at least two interconnected domain propagation loops for recirculating at least one domain associated with said cell.

Claim 29

Magnetic domain logic apparatus including a sheet of material in which single wall magnetic domains can be moved, a magnetically soft overlay pattern juxtaposed with a surface of said sheet, and means for applying a reorienting magnetic field in the plane of said sheet characterized in that said overlay pattern defines a matrix of equilateral logic cells, each cell having at least two interconnected domain propagation loops for recirculating at least one domain associated with said cell.

Claim 30

The apparatus defined in claim 23 further characterized in that each of said cells in said matrix has associated therewith at least one adjacent cell in which propagation of the domain associated with said adjacent cell can be influenced by propagation of the domain associated with the interacting cell.

Claim 31

The apparatus defined in claim 23 further characterized in that each of said cells in said matrix has at least one adjacent cell in which the associated domain is deflected from a first of said domain propagation loops to a second of said domain propagation loops as a result of magnetic interaction of said associated domain with the domain associated with the interacting cell.

Claim 32

The apparatus defined in claim 25 further characterized in that said magnetic interaction of domains occurs only when said domain associated with said interacting cell is recirculating on a first of said loops in said interacting cell.

Claim 33

Time-shared magnetic domain logic apparatus including a sheet of material in which single wall magnetic domains can be moved for processing signal information from a plurality of sources comprising: a magnetically soft overlay pattern juxtaposed with a surface of said sheet, said overlay pattern defining a plurality of domain propagating logic cells, each of said cells having at least two closed interconnected domain recirculating loops, said cells propagating information by the selective mutual repulsion of domains recirculating in adjacent cells and at least one of said cells having a branching interconnection of loops adapted to receive information to be processed; means for time multiplexing information from said sources; input transducer means responsive to said means for time multiplexing for applying said time multiplexed information to said cells adapted to receive information; output transducer means for detecting the presence or absence of domains propagating along at least one but not all of said loops in at least one of said cells other than said ceLls adapted to receive information to produce a time multiplexed processed output signal; and means for demultiplexing said time multiplexed processed output signal.

Claim 34

Time-shared magnetic domain logic apparatus including a sheet of material in which single wall magnetic domains can be moved for processing signal information from a plurality of sources comprising: a magnetically soft overlay pattern juxtaposed with a surface of said sheet, said overlay pattern defining a plurality of domain propagating logic cells, each of said cells having at least two closed interconnected domain recirculating loops, said cells propagating information by the selective mutual repulsion of domains recirculating in adjacent cells and at least one of said cells having a branching interconnection of loops adapted to receive information to be processed; means for time multiplexing information from said sources; input transducer means responsive to said means for time multiplexing for applying said time multiplexed information to said cells adapted to receive information; output transducer means for detecting the presence or absence of domains propagating along at least one but not all of said loops in at least one of said cells other than said ceLls adapted to receive information to produce a time multiplexed processed output signal; and means for demultiplexing said time multiplexed processed output signal.

Claim 35

The apparatus defined in claim 27 wherein said overlay pattern defining each of said cells having a branching interconnection of loops adapted to receive information to be processed is further arranged such that domains recirculating in said cell propagate along a first loop in said cell unless deflected into a second loop at said branching interconnection in response to information applied to said cell.