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| Number | Title | Issue Date |
| 7334736 | Antenna-coil design apparatus and design method A method of designing on a short-time basis an antenna which satisfies desired electrical characteristic values. There is provided the method of designing the antenna coil used in a non-contact IC card or a RFID. Here, the antenna-coil design method includes the fol... | 02/26/2008 |
| 7292712 | Transaction method and devices suitable therefor A transaction method, a service center, and a device for carrying out the transaction method. In the transaction method object picture data relating to a transaction object, for example a product or a service, are made visible to a user, for instance by projecting i... | 11/06/2007 |
| 7292400 | Device for limiting current in a sensor A read/write device for a disk drive is disclosed. The read/write device includes a pre-amplifier and a recording head. The read/write device also includes a write signal path between the pre-amplifier and the recording head. The write signal path includes a write c... | 11/06/2007 |
| 7289255 | Hologram apparatus, positioning method for spatial light modulator and image pickup device, and hologram recording material The present invention provides a hologram apparatus for recording interference fringes formed from reference light and signal light optically spatially modulated by a spatial light modulator on a hologram recording material or picking up an image of reproduction sig... | 10/30/2007 |
| 7098703 | Resonant logic driver circuit An electronic logic driver circuit, for driving a capacitive load between supply potentials for example for use in driving logic circuit elements on or off a chip, is disclosed. The driver circuit comprises switching devices to switch current either to or from two m... | 08/29/2006 |
| 6393371 | Voltage control of integrated circuits A method and apparatus for operating an integrated circuit in an electronic device by controlling the supply voltage to the integrated circuit (IC). A parameter of the IC is measured and used to adjust the supply voltage of the IC. The measured parameter ... | 05/21/2002 |
| 5107458 | Bubble memory peripheral system tolerant to transient ionizing radiation A transient ionizing radiation tolerant peripheral system for a magnetic bubble memory includes a transient ionizing radiation tolerant rotating field coil driver and a transient ionizing radiation tolerant function gate controller. Both the transient ion... | 04/21/1992 |
| 4635226 | Bloch line pair driving device capable of quickly driving each Bloch line pair at a low voltage In a Bloch line pair driving device comprising an inductor circuit which has first and second ends and which generates a magnetic field in a predetermined direction to drive each Bloch line pair transversely of the predetermined direction, a first switch ... | 01/06/1987 |
| 4550388 | Method of controlling stop operation of rotating magnetic field for magnetic bubble memory device In a magnetic bubble memory device in which magnetic bubbles are propagated under influence of a rotating magnetic field, a method of controlling a stop operation of a rotating magnetic field in which magnetic field is caused to further rotate beyond the ... | 10/29/1985 |
| 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 |
| 4432068 | Method of controlling a bubble memory device A method of controlling a magnetic bubble memory device comprising a rotating field generation coil for applying the rotating field to a magnetic pattern formed on a magnetic bubble memory chip and transferring the magnetic bubble along the magnetic patte... | 02/14/1984 |
| 4430729 | Series resonant drive circuit for magnetic bubble memory A series resonant drive circuit for a magnetic bubble memory includes X- and Y-coils arranged orthogonally to each other for generating a rotating magnetic field applied to a magnetic bubble memory chip, resonance capacitors each connected to a correspond... | 02/07/1984 |
| 4400809 | Arbitrary drive for magnetic field waveform control Disclosed is a method and apparatus for digital implementation and closed loop feedback of magnetic field waveforms utilizing three channels of a four channel incrementally programmable voltage source to drive field coils in each of three spatial axes, re... | 08/23/1983 |
| 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 magneto-resistive readout head element, a narrow pulse generator f... | 05/17/1983 |
| 4379341 | Series resonance drive circuit for magnetic bubble memory A series resonance drive circuit for a magnetic bubble memory comprises a magnetic bubble memory chip or chips, X and Y coils arranged orthogonally to each other to form a rotating magnetic field in a plane of the chip or chips, resonance capacitors conne... | 04/05/1983 |
| 4337520 | Bubble memory driver In magnetic bubble memories both linear and switched drive circuits are presently in use. The linear circuit can employ a capacitor to achieve resonance and may operate at a relatively high efficiency. However, when a linear coil drive circuit, which had ... | 06/29/1982 |
| 4331887 | Current switch driving circuit arrangements This current switch driving circuitry, particularly for, but not necessarily limited to, inductive device current switching, comprises a pair of output transistors constituting a driving transistor for turning ON a subsequent switching transistor and a cu... | 05/25/1982 |
| 4310898 | Minimum magnetic bubble driving circuits for multiple coils The driving circuit for supplying current to coils for generating a rotating magnetic field is divided into a switch side circuit and a driver side circuit so as to pass current through only one of the coils. Each of the switch side circuit and the driver... | 01/12/1982 |
| 4308591 | Bubble memory having non-uniformly wound Y drive field coil In a field-access magnetic bubble memory X and Y coils encircle the chip for providing the rotating XY magnetic drive field when conventional drive signals are applied thereto. At least one of the coils is non-uniformly wound to provide a first predetermi... | 12/29/1981 |
| 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 |
| 4250564 | Magnetic bubble driving device A magnetic bubble driving device produces a rotating magnetic field for a magnetic bubble memory unit by using two coils wound orthogonally to each other and cylindrically around the memory unit and by using driving circuitry for driving the coils with tr... | 02/10/1981 |
| 4247911 | Drive circuit for magnetic bubble device The present invention provides an improved method and apparatus for driving a magnetic bubble device, in which a d-c voltage supply and drive coils are connected to a bridge circuit consisting of four bi-directional switches, and alternating currents with... | 01/27/1981 |
| 4180864 | Bubble memory coil drive circuit Circuitry for use in bubble memory propagation wherein field drive coils receive energy from an energy storage device (capacitor) through a plurality of selectively located and timed switches. A basic digitally controlled switching arrangement is illustra... | 12/25/1979 |
| 4153947 | Conductor driven field access magnetic bubble memory propagation system In a magnetic bubble memory device, an improvement to the means for providing an in-plane rotational magnetic field to advance bubbles through some appropriate, staged structural form of permalloy elements is a conductor overlay positioned so that the per... | 05/08/1979 |
| 4153880 | Method and apparatus for generating a high frequency rotating magnetic field A method and apparatus for producing a high frequency rotating magnetic field, in particular for domain transport stores, utilizes a rectangular pulse sequence which is fed into two parallel connected flip-flops, one of the flip-flops having an inverter c... | 05/08/1979 |
| 4145750 | Field access magnetic bubble memory device A field access magnetic bubble memory device including a memory chip applied with an in-plane magnetic field at need is disclosed. At a transient stop operation of the device before its interrupted state, an in-plane field is removed after it has been hel... | 03/20/1979 |
| 4106088 | Current drive circuits A current drive circuit for deriving a triangular current waveform for driving an inductive load, such as the field coils of a bubble memory, comprises a series of at least four diodes connected between the positive and negative input voltage lines. A pai... | 08/08/1978 |
| 4069476 | Arrangement for producing a constant magnetic field The invention relates to an arrangement for generating a magnetic supporting field for a magnetic cylindrical domain store, having a soft-magnetic plate matrix comprising at least two plane plates arranged parallel to each other at an interval, and having... | 01/17/1978 |
| 4058801 | Field access method for bubble memories Field access system for use in propagation of bubbles is disclosed. The field access system combines discrete drive elements with a continuous drive film. An example is a Permalloy overlay consisting of a continuous drive film with protruding T & I bars w... | 11/15/1977 |
| 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 |
| 4045786 | Magnetic domain memory device having an improved drive coil arrangement An improved drive coil for a magnetic domain memory device has varying separation between adjacent conductors to improve the uniformity of the magnetic field.... | 08/30/1977 |
| 4042916 | Magnetic bubble track crossover element A magnetic bubble domain system in which magnetic bubble domains travel along propagation tracks or paths from one location to another, the complexity of the system being such that individual magnetic bubble domain paths are required to cross each other. ... | 08/16/1977 |
| 4041478 | Memory device The invention relates to a plate of magnetic material wherein magnetic domains can be formed and driven along guide structures consisting of discrete elements of magnetizable material, for example, vapor-deposited permalloy. The plate is used as a memory,... | 08/09/1977 |
| 4040018 | Ladder for information processing Information processing is conveniently achieved by a structure which uses a novel binary switch. The switch can steer two data streams so that they will either cross one another or bypass one another, depending upon external control. A linear array of shi... | 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 |
| 4034357 | Patterns for use in the field access propagation of a bubble lattice A rotating field access pattern for use in the propagation of a bubble lattice is disclosed. The pattern contains two sets of parallel oblong elements that are substantially perpendicular to each other. Four specific permalloy patterns featuring one eleme... | 07/05/1977 |
| 4027283 | Resynchronizable bubble memory A method and apparatus for the recovery of loop frame synchronization in a magnetic bubble domain memory are disclosed. One loop of the memory is used to store the parity of corresponding bits for the other loops. A special sequence of even/odd parity pat... | 05/31/1977 |
| 4008420 | Switchable high-frequency magnetic rotary fields An arrangement for the production of a magnetic rotary field with the help of a crossed coil pair of separate capacitance connected across each of said coils to form respective parallel resonant circuits each of which is in series with a timing circuit, a... | 02/15/1977 |
| 3997880 | Apparatus and machine implementable method for the dynamic rearrangement of plural bit equal-length records An apparatus for performing efficient transposition exchange sorts among equal length records is described. The apparatus takes advantage of the flow steering property of linkable circulating storage loops to minimize the average access time by positionin... | 12/14/1976 |
| 3997877 | Timing control means for a magnetic domain memory A non-volatile digital memory is utilized to generate digital pulses for controlling memory operations of a magnetic domain memory system. Each word stored in the memory contains data corresponding to the desired control signals. The digital memory synchr... | 12/14/1976 |
