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1004 results about "Current conduction" patented technology
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Conduction current is nothing but the current which is due to movement of elections in a wire. The other one is the displacement current which is due to variation in electric and magnetic fields in capacitor when AC supply is given.
Adaptive Current Regulation for Solid State Lighting
ActiveUS20110309759A1Low component requirementsSeamless and stable operationElectrical apparatusElectroluminescent light sourcesElectrical resistance and conductanceDimmer
Exemplary embodiments provide an apparatus, system and method for power conversion to provide power to solid state lighting, and which may be coupled to a first switch, such as a dimmer switch. An exemplary system comprises: a switching power supply; solid state lighting; a first adaptive interface circuit to provide a resistive impedance to the first switch and conduct current from the first switch in a default mode; and a second adaptive interface circuit to create a resonant process. An exemplary apparatus comprises: a switching power supply; and an adaptive interface circuit comprising a resistive impedance coupled in series to a reactive impedance to conduct current from the first switch in a first current path in a default mode, and further comprising a second switch coupled to the reactive impedance to conduct current from the first switch in a second current path, with the adaptive interface circuit further damping oscillation when the first switch turns on.
Owner:CHEMTRON RES
Process for preparing nanostructured materials of controlled surface chemistry
InactiveUS6669823B1Good dispersionReduce hydrolysis rateMaterial nanotechnologyMolten spray coatingCharge carrierNanostructured materials
A process to prepare stoichiometric-nanostructured materials comprising generating a plasma, forming an "active volume" through introduction of an oxidizing gas into the plasma, before the plasma is expanded into a field-free zone, either (1) in a region in close proximity to a zone of charge carrier generation, or (2) in a region of current conduction between field generating elements, including the surface of the field generation elements, and transferring energy from the plasma to a precursor material to form in the "active volume" at least one stoichiometric-nanostructured material and a vapor that may be condensed to form a stoichiometric-nanostructured material. The surface chemistry of the resulting nanostructured materials is substantially enhanced to yield dispersion stable materials with large zeta-potentials.
Owner:NANOPHASE TECH CORP
Conductive pad assembly for electrical therapy device
A pad assembly according to the invention is used for mounting a current generator for applying a therapeutic electrical current to an area of human skin. Such an assembly includes a pad comprising a thin, flexible, stretchable plastic film that conforms to human skin, which pad has electrical paths printed on an underside thereof with electrically conductive ink. Each of the paths include a terminal and a conductive contact for connection to a current generator. A pair of layers of an electrically conductive adhesive such as a hydrogel are disposed over the terminals at spaced positions for conducting electrical current to human skin underlying the terminals. A fixture secured to the pad is configured for mounting the current generator a manner effective to conduct current from the current generator to the terminals of the pad.
Owner:FIORINA MARK A +1
Silicon carbide junction barrier schottky diodes with supressed minority carrier injection
ActiveUS20060255423A1Semiconductor/solid-state device manufacturingSemiconductor devicesSchottky diodeSilicon
Integral structures that block the current conduction of the built-in PiN diode in a junction barrier Schottky (JBS) structure are provided. A Schottky diode may be incorporated in series with the PiN diode, where the Schottky diode is of opposite direction to that of the PiN diode. A series resistance or and insulating layer may be provided between the PiN diode and a Schottky contact. Silicon carbide Schottky diodes and methods of fabricating silicon carbide Schottky diodes that include a silicon carbide junction barrier region disposed within a drift region of the diode are also provided. The junction barrier region includes a first region of silicon carbide having a first doping concentration in the drift region of the diode and a second region of silicon carbide in the drift region and disposed between the first region of silicon carbide and a Schottky contact of the Schottky diode. The second region is in contact with the first region of silicon carbide and the Schottky contact. The second region of silicon carbide has a second doping concentration that is less than the first doping concentration.
Owner:CREE INC
Flip-chip light emitting diode with resonant optical microcavity
InactiveUS6969874B1Improve efficiencyAccelerate emissionsSolid-state devicesSemiconductor devicesDielectric substrateGallium nitride
A flip-chip light emitting diode with enhanced efficiency. The device structure employs a microcavity structure in a flip-chip configuration. The microcavity enhances the light emission in vertical modes, which are readily extracted from the device. Most of the rest of the light is emitted into waveguided lateral modes. Flip-chip configuration is advantageous for light emitting diodes (LEDs) grown on dielectric substrates (e.g., gallium nitride LEDs grown on sapphire substrates) in general due to better thermal dissipation and lower series resistance. Flip-chip configuration is advantageous for microcavity LEDs in particular because (a) one of the reflectors is a high-reflectivity metal ohmic contact that is already part of the flip-chip configuration, and (b) current conduction is only required through a single distributed Bragg reflector. Some of the waveguided lateral modes can also be extracted with angled sidewalls used for the interdigitated contacts in the flip-chip configuration.
Owner:NAT TECH & ENG SOLUTIONS OF SANDIA LLC
Over power compensation in switched mode power supplies
ActiveUS20100123447A1Dc-dc conversionElectric variable regulationPower compensationElectrical resistance and conductance
An over-power compensation circuit for use in a switched mode power supply having a current sense circuit for sensing a current flowing through a power transistor of the switched mode power supply. The over-power compensation circuit includes a peak detector, a sample-and-hold circuit, a current offset generator, and an offset resistor. The peak detector has an input for receiving an input voltage derived from the input line, and an output. The sample-and-hold circuit has an input connected to the output of the peak detector, and an output. The current offset generator has an input connected to the output of the sample-and-hold circuit, and an output for providing an offset current. The offset resistor has a first terminal connected to the output of the current offset generator, and a second terminal adapted to be connected to a current conducting electrode of the power transistor.
Owner:SEMICON COMPONENTS IND LLC
High conductivity buried layer in optical waveguide
InactiveUS6374001B1Layer is highReduce dissipationCoupling light guidesOptical waveguide light guideRefractive indexElectrical connection
An optical device (300) comprises a multilayer structure, formed by wafer bonding, incorporating in sequence a silicon dioxide layer (304), a buried silicide layer (306), a contact layer (308) and a silicon surface layer (310). The surface layer (310) is selectively etched to form an exposed rib (312). An upper surface of the rib (312) is doped to form an elongate electrode (314) therealong. The surface layer (310) is selectively etched to the contact layer (308) in regions remote from the rib (312) to form via channels (316a, 316b) for making electrical connection to the contact layer (308). The rib (312) forms a waveguide along which radiation propagates. When the electrode (314) is biased relative to the contact layer (308), charge carriers are injected into the rib (312) and induce refractive index changes in a central region (324) thereof where most of the radiation propagates along the rib (312). The silicide layer (306) provides an efficient current conduction path for injecting the carriers, thereby providing enhanced device operating bandwidth and reduced power dissipation.
Owner:QINETIQ LTD
Synchronous Rectifier Control Circuit and Method
ActiveUS20090316441A1Ac-dc conversion without reversalEfficient power electronics conversionCurrent loadMOSFET
In accordance with an embodiment of the present invention, a method of operating a switched power supply is disclosed. The method comprises determining a current load on a secondary side of a transformer by measuring a ratio between a secondary side current conduction time and a primary switching period of the power supply and comparing the current load with a predetermined threshold. A synchronous rectification (SR) MOSFET coupled to the secondary side of the transformer is disabled if the current load is less than the preset threshold.
Owner:INFINEON TECH AUSTRIA AG
Power supply for a load control device
A power supply for a load control device is disposed in series with an AC voltage source and a load and generates a substantially DC voltage for powering a controller of the load control device. The power supply is operable to provide substantially all voltage provided by the AC voltage source to the load and includes a controllably conductive device, a triggering device, and a charging circuit. The charging circuit is operable to charge an energy storage device and to conduct current to the load when the controllably conductive device is non-conductive. The controllably conductive device begins conducting the full load current when the energy storage device has charged to a predetermined amount of energy. Before the controllably conductive device begins to conduct, only a minimal voltage, which is substantially the same as the break-over voltage of the triggering circuit, develops across the power supply to allow the energy storage device to charge.
Owner:LUTRON TECH CO LLC
Linear aperture pseudospark switch
InactiveUS6104022AApply evenlyImprove current carrying capacityMaterial analysis by optical meansPhotoelectric discharge tubesPseudospark switchParticle collision
The present invention is of a glow discharge switch operating in the low pressure regime where gas breakdown is limited by the distance between electron-gas particle collisions (pseudospark discharge). The invention utilizes linear discharge apertures (length greater than width) in the electrodes. The linear apertures provide significantly higher current conduction without discharge constriction than conventional round-hole pseudospark switches. A radial version of the linear pseudospark switch also is disclosed that provides for self-canceling of the magnetic fields induced by the discharge, and thus prevents discharge constriction and provides for very high current conduction.
Owner:SDG LLC
Transparent electrode for an electrochromic switchable cell
Owner:PPG IND OHIO INC
Radio frequency electro-thrombectomy device
ActiveUS20180140354A1Reduce riskImprove adhesionSurgical instruments for heatingCross-linkPower flow
A device is designed to remove blockages in a lumen such as a thrombus, blood clot, or embolus. The device comprises a manipulating wire and a structure that can conduct electrical current to a lumen blockage. The electrical current is preferably in radio frequency (RF). The RF electric current in the blockage can excite the contents such as proteins of the blockage, so that cross-linking density and interfacial adsorption of the entire blockage is enhanced. The enhanced cross-linking density can result in increased fracture resistance of the blockage such that fracture of the blockage during the removal process is unlikely. The enhanced interfacial adsorption results in increased interfacial fracture resistance between the device and blockage so that the blockage can be securely captured during the removal process without using radially applied force.
Owner:THE HONG KONG UNIV OF SCI & TECH
Power tool having a brushless motor and a control unit for controlling the brushless motor
ActiveUS20140210379A1Reducing and preventing variationReduce speedSingle motor speed/torque controlDynamo-electric converter controlBrushless motorsLocation detection
A power tool according to one aspect of one embodiment described in the disclosure includes a brushless motor, a battery voltage detection unit configured to detect a voltage of a battery that provides energy for driving the brushless motor, a rotational position detection unit configured to detect a rotational position of the brushless motor, and a control unit configured to control a drive output supplied to the brushless motor based at least in part on a signal from the rotational position detection unit. The control unit controls a current conduction angle and / or an advance angle supplied to the brushless motor so that, during control of the drive output to the brushless motor, a rotational speed or a conducting current of the brushless motor approaches or reaches a target value, the target value being based at least in part on a battery voltage detected by the battery voltage detection unit.
Owner:MAKITA CORP
CPP spin-valve element
InactiveUS20050002126A1Increase resistanceLower average currentMagnetic-field-controlled resistorsSolid-state devicesCurrent limitingCoupling
A CPP spin-valve element formed on a substrate including a free layer structure including at least one ferromagnetic layer and a pinned layer structure including at least one ferromagnetic layer. The free layer is magnetically softer than the pinned layer. A thin non-magnetic spacer layer structure configured to separate the free layer and the pinned layer is provided in order to prevent a magnetic coupling between the free and pinned layer structures, and to allow an electric current to go there through. At least two current-confining (CC) layer structures including at least two parts having significantly different current conductivities are incorporated therein.
Owner:UNIVERSITY OF ALABAMA +1
Method for reading a nonvolatile memory device and nonvolatile memory device implementing the reading method
A reading method for a nonvolatile memory device, wherein the gate terminals of the array memory cell and of the reference memory cell are supplied with a same reading voltage having a ramp-like pattern, so as to modify their current-conduction states in successive times, and the contents of the array memory cell are determined on the basis of the modification order of the current-conduction states of the array memory cell and of the reference memory cell.
Owner:MICRON TECH INC
Electric current conduction system for appliance
InactiveUS20090039068A1Well formedDoors for stoves/rangesDomestic stoves or rangesElectrical conductorEngineering
An appliance is provided with an electric current conduction system. The appliance includes a main body portion including an interior cavity, and a door mounted for movement between an open position and a closed position. A driven component is coupled to the door and disposed at least partially exterior of an outer face thereof. In one example, the driven component is a light. An electric current conduction system includes a first conductor connected to the main body a second conductor connected to the door and configured to selectively engage the first conductor based upon the position of the door. Electric current is conducted between the first and second conductors when the first conductor is enaged with the second conductor. The driven component is operatively connected to the second conductor, such that electric current is conducted between the main body portion and the driven component for driving the driven component.
Owner:ELECTROLUX HOME PROD CORP NV
Electrode-Supporting Assembly for Contact-Start Plasma Arc Torch
ActiveUS20130126487A1Smooth transferConsistent positionArc welding apparatusPlasma welding apparatusAlloyEngineering
An electrode-supporting assembly for a contact-start plasma arc torch has an insulator that partially houses an electrode, and employs a spring-loaded plunger to bias the electrode to a forward position. The spring is engaged between the plunger and a contact element attached to the insulator, and may conduct electrical current to the electrode. The plunger, spring, and contact element are retained in the insulator when the torch is opened to replace the electrode, which is a consumable part. The electrode and the plunger have axially-engagable mating surfaces to assure good thermal and electrical conductivity therebetween. Conductivity can be further enhanced by forming the plunger of silver or a silver-bearing alloy. In some embodiments, a passage through the insulator is partitioned into forward and rear chambers, with the plunger, spring, and contact element trapped in the rear chamber.
Owner:THERMACUT KS
Electrochemical cell and bipolar assembly for an electrochemical cell
InactiveUS20030232234A1Promotes full humidificationDrag minimizationFuel cells groupingElectrode carriers/collectorsElectrochemical responseEngineering
A bipolar assembly for use in electrochemical cell stacks, especially stacks operated at low pressure. The bipolar assembly is lightweight and provides a "post-type" flow field that operates with a low pressure drop. The bipolar assembly comprises a gas barrier having an array of electronically conducting posts disposed approximately perpendicular to the gas barrier. Each end of the posts is in electrical communication with the surface of an electrode. Because the bipolar assembly separates a cathode from an anode, the posts contact an anode electrode on one end and a cathode electrode on the other end. The posts provide current conduction through the stack as well as provide the flow fields for the electrochemical reactants. Optionally, the bipolar assembly may contain cooling fluid channels formed by adding additional gas barriers to the bipolar assembly. The space between the gas barriers form a channel through which cooling fluids may be circulated.
Owner:LYNNTECH
High voltage cable for a miniature x-ray tube
InactiveUS20050061533A1High strengthIncrease pressureCoaxial cables/analogue cablesX-ray tube electrodesDielectricElectricity
In a miniature x-ray tube, which may be on the order of approximately 1 mm in diameter or even less, a high voltage cable is provided in various embodiments for conducting current to the cathode of the x-ray tube and for conducting high voltage to the cathode and anode of the tube. In various embodiments of the cable, two conductors occupy a center region of the cable, packed as closely together as possible, in various shapes that are compact and present as smooth as possible an external shape for maximizing dielectric properties against the exterior high voltage ground, surrounding and generally concentric with the inner conductors. The inner conductors, which carry high voltage in opposition to the outer ground, can be in opposed D shapes, coaxial, two flattened conductors side by side, or simply a pair of cylindrical wires positioned as closely as possible. The space between the inner conductors and the outer ground can be occupied by a glass insulator, polymer, successive layers of polymers and adhesive, air, gas, vacuum or other dielectrics. A partially conductive region can surround the inner conductors.
Owner:XOFT INC
System for providing over-current protection for switching power converter
InactiveCN102214987AAvoid permanent damageEffective filteringPower conversion systemsMOSFETTime delays
The invention discloses a system for providing over-current protection for a switching power converter. The system comprises a front-edge blanking circuit, a linear compensation circuit and an over-current protection comparer, wherein the front-edge blanking circuit is configured to generate a front-edge blanking effect on a detection signal of a current which flows through an external switching tube of the switching power converter; the linear compensation circuit is configured for performing linear compensation on a threshold voltage of the over-current protection comparer; and the over-current protection comparer is configured for generating an over-current protection comparison signal. By a linear compensation over-current protection circuit, the time delay of a system internal over-current protection output signal is taken into consideration, so the permanent damage of a switching tube of a metal-oxide semiconductor field effect transistor (MOSFET) caused by large-current conduction which may be generated at a high input voltage is avoided; and a maximum output power is stabilized, so the maximum power planarization of a power system can be realized in a full-voltage input range.
Owner:大连精拓光电有限公司
Power switching apparatus
InactiveUS6969927B1Wider current rating rangeSmall sizeDc network circuit arrangementsPower network operation systems integrationPower switchingEngineering
A power switching apparatus comprising a current transformer with coupled primary and secondary windings, the primary windings being adapted for series connection between alternate current power source and load, the primary windings comprising first and second sub-primary windings of different number of turns of windings and respectively of a larger and a smaller core diameter, a current conduction path being provided from intermediate the first and the second sub-primary windings to the power switching means so that upon detection of a current exceeding the current rating of the second sub-primary windings, current will be caused to flow from alternate current power source to load via a current loop comprising the power switching means and the first sub-primary windings only.
Owner:CLIPSAL ASIA HLDG
Contact for dual liner product
ActiveUS20060099793A1Improve performanceHigh carrier mobilitySemiconductor/solid-state device detailsSolid-state devicesSalicideDevice material
A structure is provided which includes a semiconductor device region including a first portion and a second portion. A current-conducting member is provided, which extends horizontally over the first portion but not over the second portion. A first film, such as a stress-imparting film, extends over the second portion and only partially over the current-conducting member to expose a contact portion of the member. A first contact via is provided in conductive communication with the contact portion of the member, the first contact via having a self-aligned silicide-containing region. A second contact via is provided in conductive communication with the second portion of the semiconductor device region, the second contact via extending through the first film.
Owner:GLOBALFOUNDRIES US INC
LED illumination device for fluorescent light fixture
InactiveUS20130328402A1Significant power saving effectStable controlBatteries circuit arrangementsElongate light sourcesPower flowElectrical battery
An LED illumination device that can be mounted between a pair of sockets provided to a fluorescent light fixture is provided with a first power source circuit that illuminates an LED using DC power obtained by converting and rectifying AC power supplied from the sockets, and a second power source circuit that illuminates the LED using an internal battery. An IC chip installed in the illumination device detects a first current conduction state in two AC power lines that supply the AC power necessary to drive the first power supply circuit and a second current conduction state in another AC power line, and, on the basis thereof, determines whether the device is in a normal illumination mode, a normal off mode, or an emergency illumination mode. On the basis of the determination results, the LED illumination device is controlled according to the mode. When in the emergency illumination mode, the LED is illuminated by the second power source circuit, and the LED illumination device functions as an emergency light.
Owner:NOGUCHI HINOKI
Tactile Sensor and Tactile Sensor Application Apparatus
InactiveUS20080271933A1Improve reliabilityLow costCathode-ray tube indicatorsDiagnostic recording/measuringElectrical resistance and conductanceElectrical conductor
A tactile sensor for detecting a variation in pressing real-time. The tactile sensor is simple in structure, detects a variation in pressing by using reduced wires, has increased reliability and reduced cost, and can obtain information accurately. A sheet has, along its surface, resistors arranged in an X direction and Y direction, has a resistor in Z direction corresponding to the thickness direction of the sheet, and has a pressure sensitive resistor sheet (4) whose resistance in the Z direction varies according to pressing in the thickness direction. At least a pair of electrodes (9, 10, 11, 12) is placed in the periphery of the pressure sensitive sheet (4), and the electrodes conduct a current to at least either of the resistor in the X direction or the resistor in the Y direction. Also, at least a pair of conductors (5, 6) for conducting a current to the resistor in the Z direction is provided on the surface of the pressure sensitive sheet (4).
Owner:EWSYST
Swithgear cell and converter circuit for switching a large number of voltage levels
InactiveUS20080315859A1Dc network circuit arrangementsConversion with intermediate conversion to dcEngineeringSwitchgear
A switchgear cell is disclosed having a first energy store and a second energy store connected in series therewith, having a first, second, third and fourth power semiconductor switch, which are connected in series, wherein the first, second, third and fourth power semiconductor switch are in each case one drivable bidirectional power semiconductor switch with a controlled unidirectional current-conducting direction. The first power semiconductor switch is connected to the first energy store, and the fourth power semiconductor switch is connected to the second energy store. A third energy store is connected to the junction between the first and the second power semiconductor switch and the junction between the third and the fourth power semiconductor switch.
Owner:ABB RES LTD
Combination ESD protection circuits and methods
Circuits, integrated circuits, apparatuses, and methods, such as those for protecting circuits against electrostatic discharge events are disclosed. In an example method, a thyristor is triggered to conduct current from a signal node to a reference voltage node using leakage currents provided by a transistor formed in a semiconductor doped well shared with the base of the thyristor. The leakage currents are responsive to a noise event (e.g., electrostatic discharge (ESD) event) at the signal node, and increase the voltage of the semiconductor doped well to forward bias the base and the collector of the thyristor. The triggered thyristor conducts the current resulting from the ESD event to the reference voltage node.
Owner:MICRON TECH INC
Movable contact assembly of electromagnetic switch
ActiveUS8269585B2Easy to assembleSimple processContact mechanismsSnap-action arrangementsPower flowEngineering
An electromagnetic switch includes: a stationary contact; a movable contact movably provided with respect to the stationary contact; a coil configured to move the movable contact to a side of the stationary contact by means of current conduction; and a shaft provided inside the coil such that the movable contact is provided at an end portion thereof, wherein a snap-fit portion having a pair of hooks disposed to face each other is provided at an end portion of the shaft, and the movable contact is fixed between the end portion of the shaft and the hook.
Owner:LSIS CO LTD
Synchronous rectifier control using load condition determination
ActiveUS7936575B2Ac-dc conversion without reversalEfficient power electronics conversionMOSFETCurrent load
Owner:INFINEON TECH AUSTRIA AG
High Power Semiconductor Package with Conductive Clip and Flip Chip Driver IC with Integrated Control Transistor
ActiveUS20120168926A1Semiconductor/solid-state device detailsSolid-state devicesBuck converterSynchronous control
One exemplary disclosed embodiment comprises a high power semiconductor package configured as a buck converter having a sync transistor with a top surface having a drain, a flip chip driver integrated circuit (IC) having an integrated control transistor, the flip chip driver IC driving the sync and control transistors, and a conductive clip electrically coupling the drain of the sync transistor to a common portion of the leadframe shared with a control source of the control transistor. In this manner, the leadframe and the conductive clip provide efficient current conduction by direct mechanical connection and large surface area conduction, significantly reducing package electrical resistance, form factor, complexity, and cost compared to conventional packages. Moreover, by integrating only the control transistor rather than both the control and sync transistor within the flip chip driver IC, the sync transistor may remain separate, simplifying manufacture and providing greater total surface area for thermal dissipation.
Owner:INFINEON TECH AMERICAS CORP
Safety Switch Using Heat Shrinkage Tube and Secondary Battery Including The Same
ActiveUS20100047674A1Reduce internal energyEfficiently dissipatedCell temperature controlHeating/cooling contact switchesInternal energyBattery cell
Disclosed herein is a safety switch including a tube that is capable of shrinking when exposed to temperatures in excess of a predetermined temperature level (“heat shrinkage tube”), wherein the length of the heat shrinkage tube is changeable to control current conduction, one end of the heat shrinkage tube is fixed, and the other end of the heat shrinkage tube is connected to an electric wire connection part, such that current conduction or current interruption is accomplished by the change in length of the heat shrinkage tube when the heat shrinkage tube is varied due to heat. When a battery or a battery pack is exposed to an abnormal environment, with the result that the temperature of the battery or the battery pack exceeds a predetermined temperature level, the heat shrinkage tube of the safety switch shrinks to directly interrupt external charge current, thereby preventing the further charge of the battery or the battery pack. Furthermore, internal energy accumulated in the battery cell is forcibly consumed, thereby fundamentally preventing the progress of the abnormal operation of the battery or the battery pack. Consequently, the safety of the battery is secured.
Owner:LG ENERGY SOLUTION LTD
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