Class 365/7 - Detectors

Subclass of Class 365 - Static information storage and retrieval
Definition: Subject matter where magnetic flux representing the bubble
No. of patents: 29
Last issue date: 10/22/2002

Number	Title	Issue Date
6469884	Internal protection circuit and method for on chip programmable poly fuses An integrated circuit (10) having at least one programmable fuse (F1) and ESD circuitry (MN3, MN1) preventing the fuse (F1) from being unintentionally blown when a voltage transient exists on a main voltage potential (Vmain	10/22/2002
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 parallel juxtaposition to allow tunneling of electrons through ...	04/03/2001
5896324	Overvoltage detection circuit for generating a digital signal for a semiconductor memory device in parallel test mode A method for detecting an overvoltage signal applied to a semiconductor memory device address pin reduces stress on the device and simplifies the testing process by dividing the voltage of the overvoltage signal and comparing it to a reference voltage, th...	04/20/1999
5023473	Drive circuit for Bloch line memory This invention accomplishes low power consumption by a drive circuit for a Bloch line memory, which includes a power source, a bias magnetic field coil, a plurality of switching means and means for returning the power supplied to the bias magnetic field t...	06/11/1991
4513396	Method of operating a magnetic bubble memory with a drive field that temporarily stops A method of operating a magnetic bubble memory (of the type that has a plurality of magnetic bubbles which move in a plane in response to a magnetic drive field that rotates in said plane) includes the steps of sending respective currents through a pair o...	04/23/1985
4308593	Interchangeable magnetic bubble memory An interchangeable magnetic bubble memory device having first and second interchangeable memory bubbles, each of the modules including a magnetic bubble memory having at least one major loop or non-recirculating track, each major loop or track including a...	12/29/1981
4280194	Parametric bubble detector A parametric bubble detector contains a coupled film sensor stripe and an excitation conductor which, electrically insulated from each other, cross at right angles. A sensor stripe consists of a pair of superpositioned Permalloy stripes which are separate...	07/21/1981
4152776	Magnetic bubble memory circuit with input swap and output replicate gates Magnetic bubble domain memory circuit in which magnetizable overlay patterns of magnetically soft material, e.g. permalloy, are provided as bubble propagation elements on a bubble-supporting magnetic layer to define major and minor bubble propagation path...	05/01/1979
4149266	Discrimination of bubble state by bubble collapse A method for detecting the wall state of a soft bubble based upon the collapse characteristics of the bubble domain on a layer of bubble domain supporting material is described. The method includes the step of exchange coupling a magnetic layer, for examp...	04/10/1979
4133043	Shift register type memory A shift register type memory having major and minor loops, wherein the number of bits of the major loop is large enough to permit data of at least two blocks to simultaneously exist in the major loop when one block is constituted of data of bits the numbe...	01/02/1979
4120042	Magnetic bubble information writing device A magnetic bubble information writing device capable of carrying out writing without erasing old information representing either "0" or "1" at a location, where new information is to be written, by means of only a single hairpin-like conductor loop is dis...	10/10/1978
4094002	Sacrificial arc suppressors in magnetic bubble memories Magnetic bubble memory chips herein are characterized by circuits of permalloy and/or electrical conductors which include patterns designed to be sacrificed if electrical charges build up during processing or handling. Improved chip yield results....	06/06/1978
4094003	Sonic magnetic domain sensor This bubble domain sensor is capable of sensing the presence or absence of a bubble at a predetermined location within bubble supporting material regardless of whether the bubble is stationary or moving through that location. A magnetostrictive material l...	06/06/1978
4086571	Magnetic bubble domain generator and annihilator Magnetic bubble domain generator and annihilator for use in a magnetic bubble domain memory device of the major-minor bubble propagation path type. The magnetic bubble domain generator and annihilator structure employs a thin metallic loop which is dispos...	04/25/1978
4085451	Bubble domain circuit organization An on-chip bubble domain circuit organization utilizing a multi-chip concept is provided. One or more storage registers are separately connected to each of a plurality of propagation channels whereby data in the form of magnetic bubble domains (bubbles) m...	04/18/1978
4075611	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 half of the total number of storage loops, a separate access ...	02/21/1978
4068220	Controllable state conversions for S=1 bubble domains A technique for controllably providing state conversions between bubble domains having a common winding number S is described. In particular, controlled conversions between bubble domains having winding number S=1 is achieved by the application of spatial...	01/10/1978
4052710	Systems using lattice arrays of interactive elements Apparatus is provided using as an integral portion thereof a confined array (such as a lattice) of interactive elements, the interactions among which are largely determinative of the positions of the interactive elements since there is a minimum of positi...	10/04/1977
4052708	Circular magnetic domain devices A cylindrical magnetic domain device which includes a layer of uniaxial magnetic material having a unique easy magnetization direction substantially normal to a major surface thereof; generating means for generating cylindrical magnetic domains within the...	10/04/1977
4040038	Column accessing of elements in confined arrays A technique for accessing interactive elements, such as magnetic bubble domains, which are in confined arrays where the elements are located with respect to one another in accordance with interactions therebetween. In order to improve the access time to a...	08/02/1977
4038541	Hard magnetic bubble domain analog multiplier Hard magnetic bubble domains are propagated in displaced orbits in response to the product of two cyclically varying propagation control fields. The control fields modulate the hard bubble domain diameter and a driving field gradient. Repulsive boundaries...	07/26/1977
4035785	Bubble domain sensor-error detector An improved thick film sensor for detection of magnetic bubble domains which can be configured to provide soft error detection and full data rate sensing. The sensor can be fabricated using single level masking techniques and is typically a magnetoresisti...	07/12/1977
4032905	Bubble domain circuit organization An on-chip bubble domain circuit organization. One or more storage registers are connected to a propagation path whereby data in the form of magnetic bubble domains (bubbles) may be transferred into and out of the storage registers. The propagation path i...	06/28/1977
4001673	Method of testing and repairing magnetic bubble domain chip A method of both testing all loops of a long serial magnetic bubble domain chip, and repairing the chip for automatic bypass of defective loops. Each repair station associated with each loop is sequentially loaded with a bubble domain. Then new domains ar...	01/04/1977
3986181	Method of and device for detecting cylindrical magnetic domains by means of ferrimagnetic resonance A method of detecting movable cylindrical magnetic domains produced in a magnetic crystal film supported on a substrate in which a microwave signal is transmitted into a restricted region between two planar conductors by means of a ferrimagnetic resonance...	10/12/1976
3973248	Non-conservative bubble logic circuits Magnetic bubble logic circuits performing the functions of various forms of flip-flops and decoders are presented. Set-reset and trigger flip-flops are constructed from specialized 3--3 conservative bubble logic circuits. Two forms of tree-type decoders e...	08/03/1976
3972035	Detection of magnetic domains by tunnel junctions Tunnel junctions are used to detect magnetic domains, such as bubble domains, using the change in Fermi level of one (or both) electrodes due to the magnetic field of the domain. The Fermi level shift causes the tunnel barrier height to change, leading to...	07/27/1976
3971038	Coercivity control and detection signal generating pattern for uniaxially anisotropic ferromagnetic crystal platelets There is disclosed coercivity control and signal generating and detection means comprising a two-dimensional lattice array of dots of magnetically susceptible material in intimate physical contact with the major plane surface of a uniaxially anisotropic f...	07/20/1976
3953840	Magneto resistive bubble detection device A differential detection device is provided for detecting the presence of magnetic bubbles in a data stream circulating on a magnetic wafer. The device utilizes an array of columns of permalloy elements to enlarge the magnetic bubbles being detected. A ch...	04/27/1976

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Class 365/7 - Detectors