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59results about How to "Solve the large impedance" patented technology
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Cell potential measuring electrode and measuring apparatus using the same
InactiveUSRE37977E1Simple manufacturing processCost benefitImmobilised enzymesBioreactor/fermenter combinationsMicroelectrodeBattery cell
This invention relates to a low impedance cell potential measuring electrode assembly typically having a number of microelectrodes on an insulating substrate and having a wall enclosing the region including the microelectrodes. The device is capable of measuring electrophysiological activities of a monitored sample using the microelectrodes while cultivating those cells or tissues in the in the region of the microelectrodes. The invention utilizes independent reference electrodes to lower the impedance of the overall system and to therefore lower the noise often inherent in the measured data. Optimally the microelectrodes are enclosed by a physical wall used for controlling the atmosphere around the monitored sample.
Owner:PANASONIC CORP
Power conversion device
ActiveUS20140321171A1Countermeasure to noiseSuppression of switchingEfficient power electronics conversionConversion constructional detailsCapacitanceEngineering
A power conversion device including a power conversion portion that switches direct current voltage supplied by a positive line and negative line of a direct current power supply with a semiconductor switching element, and outputs converted voltage, is such that a plurality of interline capacitors are connected in parallel between the positive line and negative line, the capacitance of the plurality of interline capacitors is of a value that becomes smaller the nearer to the power conversion portion the position in which the interline capacitor is connected, and the capacitance of the interline capacitor with the smallest value of capacitance is set to a value greater than that of the capacitance between main electrodes when a direct current voltage is applied to the switching element used in the power conversion portion.
Owner:FUJI ELECTRIC FA COMPONENTS & SYST CO LTD
Antenna device and communication terminal apparatus
ActiveUS20110309994A1Avoid changes in impedanceReduce resultSimultaneous aerial operationsAntenna supports/mountingsEngineeringInductor
An antenna device includes an antenna element and an impedance converting circuit connected to the antenna element. The impedance converting circuit is connected to a power-supply end of the antenna element. The impedance converting circuit is interposed between the antenna element and a power-supply circuit. The impedance converting circuit includes a first inductance element connected to the power-supply circuit and a second inductance element coupled to the first inductance element. A first end and a second end of the first inductance element are connected to the power-supply circuit and the antenna, respectively. A first end and a second end of the second inductance element are connected to the antenna element and ground, respectively.
Owner:MURATA MFG CO LTD
Voltage sensor
InactiveUS6380725B1Reduces significantly the deficienciesGood flexibilityRadiation pyrometryCurrent/voltage measurementElectric field sensorElectrical resistance and conductance
A voltage sensor for measuring the voltage on high voltage lines is formed by an electrically isolating-section of material with resistive shielding (RS) that structures the electric field generated by a voltage difference between the two ends of the isolating-section and provides shielding of the internal electric field from sources of electric field interference external to the voltage sensor. At least one electric field sensor is provided to sense the electric field in the isolating-section the output(s) of which is(are) used to infer the voltage difference.
Owner:ALSTOM TECH LTD
Secondary Side Serial Resonant Full-Bridge DC/DC Converter
InactiveUS20140153289A1Small characteristic impedanceSolve the large impedanceEfficient power electronics conversionDc-dc conversionFull bridgeCharacteristic impedance
The present invention relates to a secondary side serial resonant full-bridge DC / DC converter, comprising: a transistor full-bridge unit, a transformer unit, a resonant unit, a rectifying unit, and an output unit. Particularly, in the present invention, a resonant inductor and a resonant capacitor of the resonant unit and a load resistor of the output unit constitute a serial resonant circuit having a serial resonant frequency; therefore, when the circuit frequency is operated on the serial resonant frequency, the resonant inductor impedance would be offset by the resonant capacitor impedance, such that the circuit is operated in the zero current switch (ZCS) region, and the output voltage variation can be controlled in ±0.2%. Moreover, through the serial resonant circuit, the issue about the resonant components hard to be designed due to their small characteristic impedance can simultaneously be improved.
Owner:NAT CHUNG SHAN INST SCI & TECH
Parallel connection of inverters
ActiveUS7773396B2High Power Handling CapabilityEasy to implementAC motor controlElectric motor controlEngineeringConductor Coil
Owner:VACON OY
Solid electrolytic capacitor
InactiveUS7359181B2Reduce inductanceSolve the large impedanceLiquid electrolytic capacitorsCasings/cabinets/drawers detailsElectrolysisSurface mounting
A solid electrolytic capacitor includes a porous sintered body made of valve metal, and an external anode terminal used for surface-mounting. The anode terminal is offset from the center of the sintered body, as viewed in the thickness direction or first direction of the sintered body. Further, the anode terminal is spaced away from the sintered body in a second direction which is perpendicular to the first direction. Between the sintered body and the anode terminal is formed a conductive path, which is inclined with respect to both the first and the second directions. The path comes closer to the anode terminal in the first direction as it goes farther away from the sintered body in the second direction.
Owner:ROHM CO LTD
Ultrasonic probe and method of manufacturing the same
InactiveUS7288069B2Solve the large impedanceReduced characteristicsUltrasonic/sonic/infrasonic diagnosticsPiezoelectric/electrostrictive device manufacture/assemblyDysprosium titanateElectricity
An ultrasonic probe is characterized in that a piezoelectric member 111 formed of solution-based single-crystal containing at least plumbum titanate is sandwiched between resin layers 113 and 115 having smaller acoustic impedance than the piezoelectric member and having conductivity, so processing errors are prevented from occurring during cutting and the resin layers can be used as acoustic layers or electrodes.
Owner:TOSHIBA MEDICAL SYST CORP
Temperature control device of electric heater using thermo-sensitive resin and safety device thereof
InactiveUS20100193503A1Easy to useEasy to controlHot plates heating arrangementsOhmic-resistance heating detailsTemperature controlHeat sensitive
A temperature control device is disclosed that includes a heating wire being connected to an alternating current power source though a SCR, a sensing wire being disposed parallel to the heating wire, a thermo-sensitive resin insulating the heating wire and the sensing wire from each other and changing its impedance according to a change in temperature, and a temperature sensing unit outputting a temperature control signal to turn the SCR on or off according to a change in electric current flowing through the thermo-sensitive resin, in which the SCR is turned on or off by a sensing unit diode. The heating wire is heated by a heating current that flows in a heating cycle only, in which a forward voltage is formed in the SCR, and the sensing wire conducts a sensing current that flows in a sensing cycle only, in which a reverse voltage is formed in the SCR.
Owner:BOKUK ELECTRONICS
Parallel connection of inverters
ActiveUS20080073978A1High Power Handling CapabilityEasy to implementAC motor controlElectric motor controlEngineeringConductor Coil
Method for synchronizing inverter units (INU11, INU12) that are connected in parallel and supply a motor, and a parallel connection arrangement, in which motor is either one winding, which is supplied by inverter units connected in parallel, or a plurality of parallel windings, in which each winding is supplied by its own inverter unit, in which parallel connection one inverter unit functions as a master and the others as slaves, in which method a telecommunications bus is arranged between the units, and in which each inverter unit has its own modulation cycle counter, which are synchronized with each other on the basis of telecommunications messages, preferably serial telecommunications messages. In the invention all the inverter units take into memory the value of their own modulation counter at the termination time of a telecommunications message (Mes2), the master inverter unit sends the reading of its own counter in the following message to the other inverter units, and the other inverter units correct the reading notified by the master on the basis of the readings of their own modulation counters in the direction that makes the counters operate as simultaneously as possible.
Owner:VACON OY
Hybrid Circuit Breaker
ActiveUS20130021708A1Delayed reaction timeFast commutation timeElectric switchesArrangements responsive to excess currentPower flowSemiconductor
A hybrid circuit breaker for interrupting a fault current in an electrical circuit line having a line impedance, the hybrid circuit breaker including a mechanical circuit breaker adapted to interrupt the line upon detecting the fault current, a semiconductor device arranged in parallel with the mechanical circuit breaker to conduct the fault current when the mechanical circuit breaker is disconnected, a branch connected between the electrical circuit line and ground, the branch including an impedance unit and a control unit configured, upon detecting the fault current, to connect the impedance unit in parallel with the line impedance.
Owner:ABB (SCHWEIZ) AG
Impedance matched horn having impedance matched to impedance of an ear
InactiveUS6907121B1Minimized size and weightImprove design flexibilityInterconnection arrangementsFrequency/directions obtaining arrangementsPagerTransducer
An acoustic horn has an acoustic impedance matched with impedances of an ear and a driver. The acoustic horn can be used in an electroacoustic transducer including the driver, and the acoustic horn. The electroacoustic transducer is particularly well-suited for use in portable device such as a radiotelephone, pager, or other device.
Owner:OPTIS WIRELESS TECH LLC
Switch circuit and composite high frequency elements
ActiveUS7221922B2Reduce transmission lossPreferableRadio transmissionAntennasCommunications systemInductor
A switch circuit for switching the connection of the receiving or transmitting circuits of two communication systems to an antenna circuit, which comprises first and second switch means having two switching elements, the first switch means comprising a first inductance element between a port connected to the antenna circuit and a port connected to the second switch means; the second switch means comprising a second inductance element between a port connected to the first switch means and a port connected to a receiving circuit of a first communication system, and a transmission line constituting the first inductance element having a lower characteristic impedance than that of a transmission line constituting the second inductance element.
Owner:HITACHI METALS LTD
Current sensor
InactiveUS20070279175A1Avoid dead spacePrevent unstable weldingTransformersTransformers/inductances detailsCurrent sensorEngineering
The present invention provides a current sensor, that is, an open of a C-type core of the current sensor is capable of fastening a PCB in order to dispose the core on the PCB perpendicularly. The PCB is then elongated to an inner surface of the core so as to firmly support the core and enlarge a welding area for the convenience of welding. A front bending portion of the core is properly opposite to a Hall sensing component, and a plurality of terminals of the Hall sensing component can be bended after welding to facilitate that the Hall sensing component embeds a slot of the PCB. Therefore, the advantages of easy manufacturing and fast and stable assembly is achieved; further that, the open of the C-type core is smaller, and the magnetic flux impedance may be smaller due to the C-type core is closer to the Hall sensing component.
Owner:LIN TAI SHAN
Solid electrolytic capacitor and method of making the same
InactiveUS20070188982A1Reduce bending forcePrevent steppingLiquid electrolytic capacitorsCasings/cabinets/drawers detailsSurface mountingOptoelectronics
A solid electrolytic capacitor includes a porous sintered body made of valve metal, and an external anode terminal used for surface-mounting. The anode terminal is offset from the center of the sintered body, as viewed in the thickness direction or first direction of the sintered body. Further, the anode terminal is spaced away from the sintered body in a second direction which is perpendicular to the first direction. Between the sintered body and the anode terminal is formed a conductive path, which is inclined with respect to both the first and the second directions. The path comes closer to the anode terminal in the first direction as it goes farther away from the sintered body in the second direction.
Owner:ROHM CO LTD
Current sensing apparatus
InactiveUS20080157751A1Little transmission line lossMinimizes line lossesVoltage/current isolationElectricityLow voltage
Disclosed is a current sensing apparatus which includes a first current transformer that, when energized, has a first input current and a first output current, the first output current being less than the first input current, the first current transformer stepping down the current. The current sensing apparatus includes a second current transformer in electrical communication with the first current transformer that, when energized, has a second input current and a second output current, where the second input current is substantially less than the first output current. The second output current being greater than the first output current, the second current transformer stepping up the current. The stepped up second output current is substantially equal to a nominally rated input current of a low voltage device in electrical communication with the second current transformer.
Owner:GENERAL ELECTRIC CO
Current sensing apparatus
InactiveUS7427856B2Little transmission line lossMinimizes line lossesMeasurement using dc-ac conversionVoltage/current isolationElectricityLow voltage
Disclosed is a current sensing apparatus which includes a first current transformer that, when energized, has a first input current and a first output current, the first output current being less than the first input current, the first current transformer stepping down the current. The current sensing apparatus includes a second current transformer in electrical communication with the first current transformer that, when energized, has a second input current and a second output current, where the second input current is substantially less than the first output current. The second output current being greater than the first output current, the second current transformer stepping up the current. The stepped up second output current is substantially equal to a nominally rated input current of a low voltage device in electrical communication with the second current transformer.
Owner:GENERAL ELECTRIC CO
Circuit board and method of manufacturing the same
InactiveUS7291915B2Solve the large impedancePrinted circuit assemblingSemiconductor/solid-state device detailsGobio gobio obtusirostrisEngineering
A circuit board includes an insulating substrate, a first conductive layer on the insulating substrate, a second conductive layer on the first conductive layer, and a third conductive layer covering the first conductive layer and the second conductive layer. The first conductive layer has a surface provided on the surface of the insulating substrate, and a surface having a width smaller than a width of the above surface. In this circuit board, the conductive layers have small impedances even if a high-frequency signal flows in the conductive layers.
Owner:PANASONIC CORP
Hybrid circuit breaker
ActiveUS8810985B2Delayed reaction timeFast commutation timeElectric switchesEmergency protective arrangements for automatic disconnectionPower flowEngineering
A hybrid circuit breaker for interrupting a fault current in an electrical circuit line having a line impedance, the hybrid circuit breaker including a mechanical circuit breaker adapted to interrupt the line upon detecting the fault current, a semiconductor device arranged in parallel with the mechanical circuit breaker to conduct the fault current when the mechanical circuit breaker is disconnected, a branch connected between the electrical circuit line and ground, the branch including an impedance unit and a control unit configured, upon detecting the fault current, to connect the impedance unit in parallel with the line impedance.
Owner:ABB (SCHWEIZ) AG
Muting control device, muting control method, and muting control program
ActiveUS20090196437A1Reduce the amount presentPrevent pop noiseGain controlAmplifier modifications to raise efficiencyUltrasound attenuationEngineering
when controlling the audio signal to the mute mode from an unmute mode, first, the muting circuit switches from the non-attenuating state to the attenuating state to cause the muting circuit to attenuate the audio signal by the predetermined amount of attenuation, and then, the amount of attenuation by the volume control section is set to the maximum amount of attenuation to cause the volume control section to attenuate the audio signal by the maximum amount of attenuation.
Owner:ONKYO TECH KK
Coupled Plasmonic Waveguides and Associated Apparatuses and Methods
InactiveUS20140099054A1Solve the large impedanceEasy to measureRecord information storageNanoopticsPlasmonic waveguideLength wave
An apparatus and corresponding method in which the apparatus includes a dielectric waveguide and a metallic waveguide. The dielectric waveguide has an effective mode index and a longitudinal dimension. The metallic waveguide has a longitudinal dimension and supports a surface plasmonic mode of propagation for a wavelength lambda. The metallic waveguide and the dielectric waveguide are adjacent to each other and overlap each other by a length along the longitudinal dimensions of both the dielectric waveguide and the metallic waveguide, wherein the length is greater than the wavelength lambda in the metallic waveguide. The metallic waveguide is coupled to the dielectric waveguide where the metallic waveguide and the dielectric waveguide overlap each other.
Owner:CARNEGIE MELLON UNIV
Coupled plasmonic waveguides and associated apparatuses and methods
InactiveUS20110280515A1Solve the large impedanceEasy to measureRecord information storageNanoopticsPlasmonic waveguideLength wave
An apparatus and corresponding method in which the apparatus includes a dielectric waveguide and a metallic waveguide. The dielectric waveguide has an effective mode index and a longitudinal dimension. The metallic waveguide has a longitudinal dimension and supports a surface plasmonic mode of propagation for a wavelength lambda. The metallic waveguide and the dielectric waveguide are adjacent to each other and overlap each other by a length along the longitudinal dimensions of both the dielectric waveguide and the metallic waveguide, wherein the length is greater than the wavelength lambda in the metallic waveguide. The metallic waveguide is coupled to the dielectric waveguide where the metallic waveguide and the dielectric waveguide overlap each other.
Owner:CARNEGIE MELLON UNIV
Acoustic device
InactiveUS20060008099A1High aspect ratioIncrease energy contentPlane diaphragmsDeaf-aid setsAuditory radiationCoupling
A bending wave loudspeaker comprising a panel-form radiator and an electromechanical vibration exciter coupled to the radiator, wherein the bending stiffness of the radiator is in the range 0.001 to 1000 Nm, wherein the coupling between the exciter and the radiator is such that a component of the applied energy results in compression waves in the radiator and wherein the radiator has a break in mid-plane symmetry resulting in acoustic radiation. A method of making a bending wave loudspeaker comprising selecting a panel-form radiator and an electromechanical vibration exciter, coupling the exciter to the radiator to have a relationship between the electromechanical impedance of the vibration exciter and the mechanical impedance of the radiator useful to the operating bandwidth of the radiator, arranging the bending stiffness of the radiator to be in the range 0.001 to 1000 Nm, arranging the coupling between the exciter and the radiator to be such that a component of the applied energy results in compression waves in the radiator and providing the radiator with a break in mid-plane symmetry to cause acoustic radiation.
Owner:NEW TRANSDUCERS LTD
Electrical connector
ActiveUS20150163897A1Increase elasticityReliable electrical connectionPrinted circuit aspectsPrinted circuits stress/warp reductionElectrical conductorLiquid metal
An electrical connector for electrically connecting a first electronic element to a second electronic element includes an insulating body and multiple conductors. The insulating body has multiple accommodating holes. Each conductor is accommodated in a corresponding accommodating hole. Each conductor has an elastic insulator and low melting point liquid metal wrapping a surface of the elastic insulator, such that a continuous conducting path is formed by the liquid metal between the first electronic element and the second electronic element.
Owner:LOTES
Circuit board and method of manufacturing the same
InactiveUS20060054350A1Solve the large impedancePrinted circuit assemblingSemiconductor/solid-state device detailsGobio gobio obtusirostrisEngineering
A circuit board includes an insulating substrate, a first conductive layer on the insulating substrate, a second conductive layer on the first conductive layer, and a third conductive layer covering the first conductive layer and the second conductive layer. The first conductive layer has a surface provided on the surface of the insulating substrate, and a surface having a width smaller than a width of the above surface. In this circuit board, the conductive layers have small impedances even if a high-frequency signal flows in the conductive layers.
Owner:PANASONIC CORP
Mechanism for preventing ESD damage and LCD panel utilizing the same
ActiveUS7280327B2Preventing ESD damageLonger equivalent channel widthStatic indicating devicesSolid-state devicesEngineeringChannel width
A mechanism for preventing ESD damage and LCD panel utilizing the same. The mechanism for preventing ESD damage is configured to make ESD protection devices. The provided ESD protection devices corresponding to the longest fan-out signal lines of an integrated circuit have longer equivalent channel widths than those of the other ESD protection devices or smaller equivalent impedances than those of the other ESD protection devices, thereby discharging the electrostatic charge efficiently.
Owner:AU OPTRONICS CORP
Digital-to-analog conversion with an interleaved, pulse-width modulated signal
InactiveUS20050206544A1Maximizing numberIncrease the number ofElectric signal transmission systemsElectronic circuit testingLow-pass filterEngineering
The invention relates to a method and a circuit for digital-to-analog conversion, in which an interleaved pulse-width modulation signal (VPWM) is low-pass-filtered.
Owner:PATENT TREUHAND GESELLSCHAFT FUR ELECTRIC GLUEHLAMPEN MBH
Dual trench deep trench based unreleased MEMS resonators
InactiveUS20170170805A1Reduces footprint and fabrication complexityElegant designImpedence networksFixed capacitor dielectricResonatorEngineering
A deep trench (DT) MEMS resonator includes a periodic array of unit cells, each of which includes a single DT formed in a semiconductor substrate and filled with a material whose acoustic impedance is different than that of the substrate. The filled DT is used as both an electrical capacitor and a mechanical structure at the same time, making it an elegant design that reduces footprint and fabrication complexity. Adding a second DT to each unit cell in a DT MEMS resonator forms a dual-trench DT (DTDT) MEMS resonator. In a DTDT unit cell, the first DT is filled with a conductor to sense, conduct, and / or generate an acoustic wave. The second DT in the DTDT unit cell is filled with an insulator. The width, filling, etc. of the second DT in the DTDT unit cell can be selected to tune the acoustic passband of the DTDT unit cell.
Owner:MASSACHUSETTS INST OF TECH
Low power integrated circuit
ActiveUS20100214019A1More currentImprove noise figureAmplifier modifications to reduce noise influenceAmplifier combinationsAudio power amplifierLow power dissipation
The present invention relates to an integrated electrical circuit in particular a receiver or driver suitable for broadband communication, such as optical interconnect. The circuit comprises two amplifiers which share current supply wherein the integrated circuit is arranged so that cross talk via this current supply is avoided over a large range of frequencies.
Owner:MELLANOX TECH DENMARK APS
Antenna matching circuit, antenna device, and communication terminal apparatus
ActiveUS20170302246A1Solve the large impedanceEffective impedanceMultiple-port networksAntenna supports/mountingsCapacitanceAutotransformer
An antenna device includes an impedance converter circuit connected to a feeder circuit, an impedance-conversion-ratio adjustment circuit, and an antenna. The impedance converter circuit includes a first inductance element and a second inductance element, which are coupled to each other through magnetic fields, so as to provide an autotransformer circuit. The impedance-conversion-ratio adjustment circuit includes a third inductance element which is series-connected between the impedance converter circuit and an antenna port, and a capacitance element which is shunt-connected between the antenna port and ground. The impedance-conversion-ratio adjustment circuit corrects an impedance conversion ratio of the impedance converter circuit in accordance with a frequency band.
Owner:MURATA MFG CO LTD
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