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US 4,225,944 AGranted
Bubble memory chip organization-folded loop type
AssigneeBurroughs Corporation
InventorsSidney J. Schwartz, Chung H. Hsin
Life of this patent
Estimating the term…
Abstract
A bubble memory organization with a plurality of storage loops in-plane folds allows the selective spacing of transfer and other functional elements from each other eliminating crowded conditions at loop ends. This permits the selective placement of the functional elements for the maximization of operating margins. This can also lead to reduced current requirements because passive replicate elements may be used, to reduced transfer line impedances, to reduced number of conductor lines and to a reduced number of transfer points per memory array. For the designs where passive replication is chosen, reliability is improved due to the reduction in current density to levels further below the conductor electromigration thresholds.
Claims25
A bubble memory organization comprising:
- a bubble propagation structure including magnetic elements disposed in an arrangement on which magnetic bubbles propagate element-to-element in response to a rotating in-plane magnetic field;
- the arrangement including a predetermined number of storage loops having a number of said magnetic elements on which said bubbles circulate;
- means for generating bubbles and for propagating said bubbles for transfer into said storage loops;
- and
- a plurality of bubble manipulation devices for performing a desired function;
- each storage loop containing at least one in-plane fold to vary the number of propagate elements so that said bubble manipulation devices can be selectively located relative to one another with some of said bubble manipulation devices being connected to and operable by one conductor for manipulating said bubbles relative to said storage loop and relative to other manipulation devices;
- said other bubble manipulation devices being transfer-in ports and transfer-out ports for transferring bubbles into said storage loops and out of said storage loops and located on one side of each of said storage loops with one conductor line connected to both said ports for actuating said transfer-in or transfer-out of bubbles as desired.
4 more elements
A bubble memory organization comprising:
- a bubble propagation structure including magnetic elements disposed in an arrangement on which magnetic bubbles propagate element-to-element in response to a rotating in-plane magnetic field;
- the arrangement including a predetermined number of storage loops having a number of said magnetic elements on which said bubbles circulate;
- means for generating bubbles and for propagating said bubbles for transfer into said storage loops;
- a plurality of bubble manipulation devices for performing a desired function;
- each storage loop containing at least one in-plane fold to vary the number of propagate elements so that said bubble manipulation devices can be selectively located relative to one another with some of said bubble manipulation devices being connected to and operable by one conductor for manipulating said bubbles relative to said storage loop and relative to other manipulation devices;
- other of said bubble manipulation devices being transfer-in ports and transfer-out ports for transferring bubbles into said storage loops and out of said storage loops;
- and
- wherein said transfer-in port and transfer-out port are located on opposite sides of the storage loop and further including a passive replicator and second transfer-out port for transferring bubbles out of said storage loop to said passive replicator where said bubbles are replicated and transferred to said second transfer-out port, both said transfer-out ports being connected by one conductor for activation thereby.
5 more elements
A bubble memory organization comprising:
- a bubble propagation structure including magnetic elements disposed in an arrangement on which magnetic bubbles propagate element-to-element in response to a rotating in-plane magnetic field;
- the arrangement including a predetermined number of storage loops having a number of said magnetic elements on which said bubbles circulate;
- means for generating bubbles and for propagating said bubbles for transfer into said storage loops;
- a plurality of bubble manipulation devices for performing a desired function;
- each storage loop containing at least one in-plane fold to vary the number of propagate elements so that said bubble manipulation devices can be selectively located relative to one another with some of said bubble manipulation devices being connected to and operable by one conductor for manipulating said bubbles relative to said storage loop and relative to other manipulation devices;
- and
- wherein said bubble manipulation device includes a passive replicator located in said storage loop for automatically replicating bubbles stored therein, a first transfer-out port for transferring bubbles out of said storage loop and a second transfer-out port connected to said passive replicator, both said transfer-out ports being connected by a single conductor for activation simultaneously.
4 more elements
A bubble memory organization comprising:
- a bubble propagation structure including magnetic elements disposed in an arrangement on which magnetic bubbles propagate element-to-element in response to a rotating in-plane magnetic field;
- the arrangement including a predetermined number of storage loops having a number of said magnetic elements on which said bubbles circulate;
- means for generating bubbles and for propagating said bubbles for transfer into said storage loops;
- a plurality of bubble manipulation devices for performing a desired function;
- each storage loop containing at least one in-plane fold to vary the number of propagate elements so that said bubble manipulation devices can be selectively located relative to one another with some of said bubble manipulation devices being connected to and operable by one conductor for manipulating said bubbles relative to said storage loop and relative to other manipulation devices;
- and
- wherein said bubble manipulation devices include a transfer-in port and a final merge port connected to said means for generating bubbles and for propagating bubbles for transfer into said storage loops;
- a second merge port connected to said transfer-in port and an active replicate/transfer gate connected to said first merge port;
- and detector means connected to said first merge port.
6 more elements
A bubble memory organization comprising:
- a bubble propagation structure including magnetic elements disposed in an arrangement on which magnetic bubbles propagate element-to-element in response to a rotating in-plane magnetic field;
- the arrangement including a predetermined number of storage loops having a number of said magnetic elements on which said bubbles circulate;
- means for generating bubbles and for propagating said bubbles for transfer into said storage loops;
- a plurality of bubble manipulation devices for performing a desired function;
- each storage loop containing at least one in-plane fold to vary the number of propagate elements so that said bubble manipulation devices can be selectively located relative to one another with some of said bubble manipulation devices being connected to and operable by one conductor for manipulating said bubbles relative to said storage loop and relative to other manipulation devices;
- a transfer-in port and a final merge port connected to said means for generating bubbles and for propagating bubbles for transfer into said storage loops;
- a second merge port connected to said transfer-in port and a replicator/transfer gate connected to said final merge port;
- and
- detector means connected to said final merge port.
6 more elements
A bubble memory organization comprising:
- a magnetic bubble domain propagation structure including magnetic elements on which bubbles propagate element-to-element in response to a rotating in-plane magnetic field, said propagate elements defining bubble flow tracks,
- a plurality of bubble manipulation devices for performing a desired function and oriented on said structure differently from each other and relative to different field directions of said rotating in-plane magnetic field,
- each said bubble manipulation devices being located to receive bubbles from one flow track and to direct said received bubbles to a second flow track, and
- a single electrical conductor means coupled to said plurality of bubble manipulation devices to activate said devices to direct said bubbles onto said second flow track in response to the application of a current pulse on said electrical conductor means,
- said current pulse being applied at selected field directions of said rotating in-plane magnetic field which activates certain of said bubble manipulation devices and not others depending on the orientation of said devices.
2 more elements
A magnetic memory organization comprising:
- a magnetic bubble domain propagation structure including propagate elements on which domains propagate element-to-element in response to a rotating in-plane magnetic field,
- a plurality of said propagate elements arranged in a loop configuration,
- a plurality of propagate elements defining four bubble tracks and having four bubble manipulation devices located diagonally opposite each other and connecting said flow tracks,
- two of the diagonally opposite bubble manipulation devices respectively being transfer-in port and a transfer-out/replicate port, said transfer-out replicate port being adjacent said loop configuration, and
- electrical conductor means associated with said transfer-in port and transfer-out/replicate port to cause magnetic bubble domains to transfer from one bubble track to another in response to the application of a pulse to said electrical conductor means.
2 more elements
Dependencies are inferred from the claim text.