Matches 1 - 50 out of 147 1 2 3 >
Match Document Document Title
5648943 Disk recording/reproduction device of reduced thickness with driving mechanism for moving heads parallel to the disk face  
A disk recording/reproduction device according to the present invention includes: a recording medium including a disk and a protective case for the disk; loading mechanism for guiding the recording...
4881198 Duplicator in a magnetic bubble memory and process for duplicating bubbles therein  
A duplicator in a magnetic bubble memory with non-implanted patterns, a process for realizing the duplicator and a serial - parallel magnetic bubble memory having at least one of the aforementioned...
4837741 Magnetic bubble memory device  
In a magnetic bubble memory device in which a major line and minor loops are constituted by ion-implanted tracks, a gate is constituted having two functions, i.e., having a replicate function and a...
4694424 Combined nucleate-replicate single wall domain generate structure  
A bubble generator for use in a bubble memory device combines a nucleating generator and replicating generator in a unified structure with first and second hairpins disposed at respective first and...
4577290 Replicator with improved propagation performance  
Bubble-to-bubble interaction in a magnetic bubble domain memory is reduced by a notch provided in the outer edge of the replicator of the bubble memory device. The notch serves to slow down the...
4561069 Magnetic bubble memory device gates  
A magnetic bubble memory device comprises minor loops for the storage of information and a major loop operably associated with the minor loops through gates, the minor loops being defined by an...
4547865 Magnetic bubble replicator  
In a magnetic bubble replicator having a soft magnetic material element for propagating a magnetic bubble along an edge thereof in response to a change in a direction of an external magnetic field...
4535422 Magnetic bubble memory with unimplanted motifs  
The invention relates to a magnetic bubble memory having a first layer of monocrystalline magnetic material with at least one crystallographic axis having the property of being aplanar easy...
4528645 Magnetic bubble memory device  
A magnetic bubble memory device is disclosed in which a magnetic bubble propagation circuit for forming a minor loop is formed by ion implantation, and at least part of a major line or major loop...
4525807 Magnetic bubble store with non-implanted motifs and method for controlling the same  
A magnetic bubble store, using adjoining non-implanted motifs as bubble-propagating motifs, the store comprising 3n identical, electrically interconnected storage devices, n being a positive...
4519049 Magnetic bubble memory having auxiliary storage loops  
A magnetic bubble memory has a plurality of minor loops for storing data represented by magnetic bubble sequences, a write line for transferring write data to couple them to the minor loops and a...
4471468 Magnetic bubble memory device  
A magnetic bubble memory device has a plurality of memory loops which comprise minor loops and a map loop arranged independently of the minor loops. The map loop stores index data and parameter...
4468757 Method of operating magnetic bubble memory device in multipage mode  
A magnetic bubble memory system controller is provided to interface a user system and a magnetic domain chip. The controller will functionally accept commands from a user system and deliver those...
4463447 Magnetic bubble generator  
A nucleation type magnetic bubble generator according to this invention has a conductor loop which consists of a hairpin portion and wiring portions. Moreover, the relationship of W≤3/4 P holds...
4458334 Redundancy map storage for bubble memories  
A magnetic bubble domain memory device is provided that includes a magnetic bubble domain data chip having a major/minor loop organization in which one or more defective minor loops may be...
4435784 Multi-replicator stretcher detector  
A detector for magnetic bubble domain devices including an input path for receiving and propagating magnetic bubble domains, an expander device which intersects the input path and functions to...
4434476 Magnetic bubble memory device and method for operating the same  
A magnetic bubble memory device includes: a magnetic layer with a first region having an easy axis of magnetization extending in a certain direction and a second region surrounding the first region...
4423489 Replicator for ion-implanted bubble domain devices using stretching action of charged wall  
A replicator for an ion-implanted magnetic bubble domain device including a single level conductor bubble cutting element disposed between first and second spaced apart bubble domain guide...
4415987 Magnetic bubble passive replicator  
A passive replicator for bubble devices receives a bubble from an input channel and splits that bubble into two bubbles which go into two separate output channels when a rotating magnetic field is...
4414648 Magnetic bubble domain swap gate circuit  
A magnetic bubble domain swap gate circuit (28) for use with a magnetic bubble element having an information transmission line along which magnetic bubble domains are transferred and an information...
4414647 Bubble domain replicator for contiguous-disk devices  
A bubble domain replicator for ion-implanted contiguous disk devices has a cusp portion and a tip portion extending substantially away from the cusp portion so that the cusp forms part of a super...
4403304 Replicator for ion-implanted bubble domain devices  
A replicator for a magnetic bubble domain device including a hairpin loop conductor element traversing first and second spaced apart bubble domain guide structures. The replicator functions to...
4386417 High performance bubble chip architecture  
A major/minor loop bubble memory system architecture includes a passive replicator in the major loop read channel which is connected by a first path to a mode switch-annihilator and a merge point...
4370735 Magnetic bubble memory device  
A magnetic bubble memory device having a bubble generator which generates a magnetic bubble by conducting a pulse current on its hairpin-shaped conductor loop and a major propagation circuit for...
4370734 Switching method for effecting replication in magnetic bubble devices  
Replication in a magnetic bubble device is realized by a method of operation that is based on the principle of stretching, then cutting the bubble by the control current pulses. In this mode of...
4360904 Segmented stretcher detector for magnetic bubble domain devices  
A magnetic bubble domain device including a segmented stretcher detector. The detector is formed from a propagation path for magnetic bubble domains, and a first replicator disposed adjacent the...
4346454 Bubble memory with on chip error map storage on permalloy disk elements  
A bubble memory chip includes a plurality of data loops, some of which may be defective, for storing magnetic bubbles representative of data therein. A serial-parallel input propagation path and a...
4333162 Bubble memory with conductor programmable transparent error map  
Disclosed is a bubble memory having a plurality of data loops, some of which may be defective, and first input and output paths for propagating magnetic bubbles to and from the data loops,...
4321693 Magnetic bubble memory chip with dedicated redundancy data section provided thereon  
A magnetic bubble memory chip structure on which a plurality of magnetic bubble storage loops are provided for containing information data as represented by bubbles and voids and including a...
4316263 Transfer and replication arrangement for magnetic bubble memory devices  
A magnetic bubble replication and transfer arrangement is disclosed which provides for replicating magnetic bubbles in thin planar layers of magnetic material without the need for electrical...
4301517 Replicate/transfer bubble domain switch  
An active replicate/transfer magnetic bubble domain switch which is especially compatible with gap tolerant structures is provided. The switch includes a broadfaced corner element of relatively...
4301516 Bubble memory storage unit  
A magnetic bubble domain memory device is provided that includes a magnetic domain data chip having a major-minor loop organization with on-chip firmware providing redundancy information enabling...
RE30732 Consecutive bit access of magnetic bubble domain memory devices  
A magnetic bubble domain chip layout or organization which achieves consecutive bit access is provided by arranging the device in two substantially identical halves or parts. Each half contains...
4276612 Magnetic bubble memory device with divided electrical conductors  
A magnetic bubble memory device according to this invention is characterized in that an electrical conductor which supplies a current pulse for driving gates having a replicating function is...
4272817 Multiplexed single wall domain generators  
An improved magnetic domain generator for a magnetic arrangement employing a layer of garnet in which single wall domains (bubbles) are moved by an in-plane rotating magnetic field. A first domain...
4270186 Multiple generator block replicate bubble memory device  
A block replicate bubble memory device is provided with a plurality of series storage loops, wherein data words are written into or read out of the storage loops in parallel. The data is entered...
4259727 Magnetic bubble memory device  
A magnetic bubble memory device which comprises special minor loops for storing address information regarding spare minor loops corresponding to defective regular minor loops. The structure of the...
4253159 Ion-implanted bubble memory with replicate port  
A replicator for an ion-implanted magnetic bubble memory includes an offset hairpin geometry. The conductor is associated with features in adjacent bubble paths which exhibit strong attracting...
4246648 Phase controlled replicate/swap gate for bubble memories  
Replicate/swap gating circuitry comprising separate gates oriented to be responsive to different phases of an in-plane magnetic field for transferring data to and from an adjacent storage loop in a...
4238836 Fail safe magnetic bubble memory  
The familiar G-shaped, non-closed, major path in a major-minor, magnetic bubble memory is formed controllably into a closed circumferential major loop about the minor loops during operation. A...
4229807 Current controlled disk replicator  
A magnetic bubble domain chip having two levels of metallurgy fabricated in a single masking step and including a replicate type bubble generator. The bubble generator includes a magnetic disk...
4228522 Bubble memory with redundant on chip error map storage loops  
Disclosed is a magnetic bubble memory that includes a plurality of minor loops for storing bubbles representative of data therein, and a pair of minor loops for storing bubbles representative of an...
4225944 Bubble memory chip organization-folded loop type  
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...
4202043 Bubble memory defect tolerant logic control circuit  
A bubble memory system comprising data chips each having a plurality of storage loops and wherein each is provided with additional storage loops to compensate for defective loops in the chip, and a...
4193124 Swap and replicate gates for magnetic bubble memory  
Input swap transfer/replicate gate and output replicate gate for use in a magnetic bubble memory arrangement between the bubble storage loops and the input and output sections respectively on...
4190900 Major/minor loop bubble memory with timing loop  
A major/minor loop bubble memory configuration that provides gap free serial access to the data in the minor loops and which maintains the non-volatility of data when subjected to a power-on-off-on...
4176404 Bubble memory structure with enhanced data density  
A magnetic bubble memory structure having an enhanced storage density is made possible by reducing the circuit period, that is the distance between bubbles, in the storage section of the device....
4164029 Apparatus for high density bubble storage  
A magnetic bubble storage system and a method for making it using only two masking steps, one of which is critical. In a preferred embodiment, the storage regions are comprised of ion implanted...
4159412 Magnetic bubble memory chip synchronization and redundancy  
A magnetic memory system is provided that includes magnetic domain data chips having a block replicate organization wherein the system may include data chips having one or more defective minor...
4156937 Noncirculating register for bubble memory systems  
A noncirculating register for bubble memory systems is comprised of a propagation track, or shift register, which allows the transmission of bubbles in a serial path, a plurality of bubble idlers...
Matches 1 - 50 out of 147 1 2 3 >