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8044816 |
Apparatus, system, and method for detecting the formation of a short between a magnetoresistive head and a head substrate
An apparatus, system, and method are disclosed for detecting the formation of a short between a magnetoresistive (“MR”) head and a head substrate. The apparatus is presented with a logic unit con...
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7736234 |
MRAM as critical event storage for powered down gaming machines
Gaming machines and systems having MRAM and MROM are disclosed. MROMs for storing boot programs and other Read Only code are formed by cutting write connections or not providing PCB socket leads to...
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7722468 |
Magnetoresistive memory units as read only memory devices in gaming machines
Gaming machines and systems having MRAM and MROM are disclosed. MROMs for storing boot programs and other Read Only code are formed by cutting write connections or not providing PCB socket leads to...
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6917088 |
Magneto-resistive devices
A magneto-resistive device has a high reproducing output and is suitable for use as a CPP-GMR device. The magneto-resistive device has a first magnetic layer, a second magnetic layer, and a...
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6639829 |
Configuration and method for the low-loss writing of an MRAM
A configuration and method for low-loss writing of an MRAM includes setting voltages at bit lines and word lines such that the voltage across the memory cells between a selected word/bit line and...
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6211559 |
Symmetric magnetic tunnel device
A symmetric magnetic tunnel device including first and second magnetic tunnel junctions each including a pinned magnetic layer, an insulating tunnel layer and a free magnetic layer stacked in...
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6166948 |
Magnetic memory array with magnetic tunnel junction memory cells having flux-closed free layers
An improved magnetic tunnel junction (MTJ) memory cell for use in a nonvolatile magnetic random access memory (MRAM) array has a free layer formed as two ferromagnetic films that are...
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5982658 |
MRAM design to reduce dissimilar nearest neighbor effects
A magnetoresistive memory array which has a row of active sense lines with each sense line including magnetoresistive bits and word lines extending over the bits. Each active sense line ending in a...
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5088059 |
Detection device for magnetic bubble memory
Detection device for a magnetic bubble memory having a detection zone (6) constituted by rows (7) of patterns (8) suitable for the propagation of bubbles in strip form, as well as a transition zone...
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4912673 |
Detection system for a magnetic bubble memory in hybrid technology
Magnetic bubble memory in hybrid technology using rows of chevron patterns. The memory detection system has an active detection zone (4) constituted by rows of chevrons, in order to stretch into...
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4829476 |
Differential magnetoresistive memory sensing
A sensing circuit for sensing magnetic states of magnetic bit structures through selectively providing current through and across selected ones of such bit structures while selectively sensing and...
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4811286 |
Magnetic bubble memory device
A magnetic bubble memory has a reading zone with thin detection elements, coated with an insulating layer which carries thick bubble propagation patterns of high magnetic permeability material, and...
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4686472 |
Magnetic sensor having closely spaced and electrically parallel magnetoresistive layers of different widths
A magnetic sensor for sensing magnetic fields including two flat layers of electrically conductive ferromagnetic material (11, 16) each having an in-plane easy axis of magnetization (EA1, EA2) and...
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4589095 |
Magnetic bubble stretcher
A magnetic bubble stretcher comprises a bubble fanning part for propagating a magnetic bubble while gradually stretching the bubble and a bubble propagation part for propagating the stretcher...
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4589041 |
Differential magnetoresistive sensor for vertical recording
An MR sensor is disclosed in which a pair of thin film magnetoresistive strips are connected electrically in parallel between two terminals. Strips are spaced apart a distance which is small...
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4538242 |
Signal processing circuit for magnetic bubble memory devices
A signal processing circuit for a magnetic bubble memory device is arranged to set a reference level for determining the level of "1" or "0" of the bubble sensing line signal during a period in...
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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...
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4517662 |
High-speed, compact magnetic bubble stretcher
A magnetic bubble memory (of the type that has a magnetic film, a plurality of magnetic bubbles in the film, and an insulating layer over the film) includes an improved electromagnetic structure on...
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4514828 |
Magnetic bubble memory sense amplifier having a pulsed current mode of operation
A temperature compensated, phase tolerant sense amplifier for use in a magnetic bubble memory system in which current is applied to the detector resistors only during a bubble detect operation.
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4511995 |
Detector-dummy detector combination which is integrated as a single element of reduced size
A magnetic bubble memory includes a planar magnetic film containing a plurality of magnetic bubbles which move in response to a magnetic field that rotates the film's plane; and further includes an...
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4502129 |
Magnetic bubble detector
A magnetic bubble detector has a stretcher part for stretching a magnetic bubble while propagating it and a detection part for detecting the magnetic bubble while propagating it. In the magnetic...
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4485319 |
Bubble memory sense amplifier
A sense amplifier which is fully integrated has an on-chip voltage regulator to provide essentially error free operation. The sense amplifier provides peak-to-peak signal detection for comparison...
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4475238 |
Magnetoresistive image correlation device
An image correlation device utilizing the principle of magnetoresistance. A sensed image is compared to a preselected mask image to determine whether the two images match. The comparison is...
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4471467 |
Magnetic domain device
A magnetic device comprising at least one thin layer of a magnetizable material which has an easy axis of magnetization approximately normal to the surface of the layer. Magnetic domains are...
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4470873 |
Method of manufacturing magnetic sensor comprising at least two magnetoresistive elements
A magnetic sensor including first and second electromagnetic elements arranged one on the other is manufactured by depositing on a glass substrate a first magnetoresistive film of Fe-Ni permalloy,...
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4460976 |
Field access magnetic bubble memory with improved expander-detector arrangement
A field-access magnetic bubble memory includes an improved expander-detector arrangement. An optimized element shape provides for a constant magnetic field strength at critical points in the drive...
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4458335 |
Detector structure for ion-implanted contiguous-disk bubble devices
A detector structure for contiguous-disk bubble devices has a non-ionimplanted elongated bar, a hairpin conductor and a thin-film magneto-resistive element. The elongated bar is positioned in...
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4445200 |
Magnetic bubble memory detection method and device
A current stretch detection method for a bubble device in which bubbles are written at least one bit apart. A stretch pulse is applied to a stretch conductor so that when a bubble is detected, it...
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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...
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4432069 |
Multiplexed magnetic bubble detectors
A multiplexed magnetic bubble detector is described which includes a pair of detectors each having a propagation element and an underlying detector element. In one of the detectors the detector...
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4412307 |
Magnetic bubble detector
A magnetic bubble detector for an ion-implanted bubble memory is achieved by using a permalloy detector element and two conductors. The conductors are operative first to stretch a bubble from one...
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4404652 |
Side feed expander
A side feed expander for magnetic bubble devices is disclosed. The side feed expander includes a row of expander elements and an input propagation element associated with one of the sides of an...
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4400796 |
Temperature compensated sense amplifier
A temperature compensated, phase tolerant sense amplifier for use in a magnetic bubble memory system in which current is applied to the detector resistors only during a bubble detect operation.
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4388699 |
Bubble memory sense amplifier
A bubble sense amplifier has a biasing circuit for adjusting the bias currents through magneto-resistive detectors so as to establish a preferred common mode operating voltage across the bubble...
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4384346 |
Thin film magneto-resistive apparatus for effecting readout from magnetic memory devices
The present invention provides thin film magneto-resistive readout apparatus for providing readout from magnetic memory devices such as magnetic tapes, the apparatus comprising a thin film...
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4382288 |
Thin film magnetic bubble detector
A magnetic bubble detector which includes chevron propagation elements and underlying thin film magnetoresistive members is described. A portion of the dummy detection member is misaligned from its...
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4369501 |
Dual cycle data detection system and method for bubble memories
A data detection system and method for a bubble memory is disclosed in which the memory is operated in a start-stop mode during reading of data stored in two separate major loops which are stepped...
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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...
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4327423 |
Magnetic bubble transducer
A circuit arrangement is disclosed for sensing a presence or absence of a low-level output signal which may be used for detecting a change of resistance in a magnetic bubble detector. The circuit...
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4323983 |
Magnetic bubble detector
A magnetoresistive bubble detector which includes an expander, a first and second detector element and a dummy element is disclosed. An expanded bubble is propagated from the first detector element...
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4321691 |
Redundant bubble detector
A magnetic bubble detector stretches a single magnetic bubble domain across two isolated magneto-resistive sensors so that only one of the sensors needs to be functional in order to detect the...
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4318187 |
Phase tolerant magnetic bubble memory sense amplifier
A temperature compensated, phase tolerant sense amplifier for use in a magnetic bubble memory system in which current is applied to the detector resistors only during a bubble detect operation.
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4318186 |
Magnetic bubble memory with detector
A magnetic bubble memory herein includes a detection circuit which responds to changes in data signal which occur in consecutive detection intervals. In one embodiment changes from both 0 to 1 and...
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4308592 |
Patterned kill of magnetoresistive layer in bubble domain chip
A technique and structure is described in which bubble domain devices can be made, and particularly bubble domain devices comprisng contiguous propagation elements. A thin magnetoresistive layer,...
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4302822 |
Thin-film magnetic bubble domain detection device and process for manufacturing the same
A thin-film bubble domain detection device for use in a magnetic bubble memory comprises two metallic conductor leads formed with sloped opposing edges on the SiO2 spacer layer of a garnet...
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4300209 |
Method for adjusting signal level output from a magnetic bubble detector
A method for adjusting output signal levels from a magnetic bubble detector. Portions of the chevron stacks located adjacent to either the detector element or dummy element are selectively removed....
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4293930 |
Bubble detection system
There is disclosed a double detection arrangement for minimizing soft errors emanating from a bubble memory. Soft errors are errors due to sporadic, periodic, and random noise which gives an...
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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...
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4283774 |
On-chip method of balancing memory detectors and balanced detectors formed thereby
A method of forming detector and dummy detector pair(s) of magnetoresistive elements on a bubble memory chip, with detector and dummy detector each having a balancing resistance network comprising...
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4275459 |
Magnetic bubble detector arrangement
A permalloy detector for a magnetic bubble memory employs a stack of chevron elements astride the bubble path. Alternate ones of the elements are positioned at an angle to the path of bubble...
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