Magnetic Or Electrostatic Field Control (e.g., Shielding) Patents (Class 307/91)
  • Patent number: 10324144
    Abstract: In some examples, a device includes a first conductive region and a second conductive region that is galvanically isolated from the first conductive region. The device further includes one or more conductors, wherein each conductor of the one or more conductors is electrically connected to circuitry in the first conductive region. The device also includes a giant magnetoresistive (GMR) sensor electrically connected to circuitry in the second conductive region and magnetically coupled to the one or more conductors, wherein the GMR sensor is positioned at least partially lateral relative to the one or more conductors.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: June 18, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Hermann Gruber, Sergio Morini, Wolfgang Raberg, Holger Wille
  • Patent number: 10174603
    Abstract: The present invention relates to a method of visualizing a downhole environment using a downhole visualization system. The downhole visualization system comprises a downhole tool string comprising one or more sensors, a downhole data processing means for processing the sensor signals to provide sensor data, an uphole data processing means for uphole processing and visualization, and a data communication link operable to convey the sensor data from the downhole data processing means to the uphole data processing means, the sensors being capable of generating sensor signals indicative of one or more physical parameters in the downhole environment. The downhole visualization system further comprises a downhole data buffering means capable of receiving the sensor data from the downhole data processing means and temporarily storing the sensor data in the downhole data buffering means.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: January 8, 2019
    Assignee: WELLTEC A/S
    Inventors: Jens Barfoed, Jørgen Hallundbæk
  • Patent number: 10007302
    Abstract: A mobile computer suitable for use in an MRI environment is disclosed. The mobile computer includes at least one shielded cavity in which the electronics for the mobile computer are inserted. The shielded cavity inhibits undesirable emissions from the mobile computer from affecting the quality of the image obtained by the MRI scanner and inhibits electrical interference generated by the dynamic magnetic fields in the MRI scanner from affecting the performance of the mobile computer. In addition, the components used in the mobile computer are selected from non-ferrous materials and are arranged in a manner to minimize interaction between the mobile computer and the MRI scanner.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: June 26, 2018
    Assignee: Neocoil, LLC
    Inventors: Brian Brown, Stephen G. Hushek
  • Patent number: 9995600
    Abstract: A system and method for providing a position and orientation sensor package having a reduced size in at least one dimension is disclosed. The position and orientation sensor package includes a dielectric substrate and a first magneto-resistance sensor chip attached to the dielectric substrate, the first magneto-resistance sensor chip including at least one magneto-resistance sensor circuit. The position and orientation sensor package also includes a second magneto-resistance sensor chip attached to the dielectric substrate and positioned adjacent the first magneto-resistance sensor chip, the second magneto-resistance sensor chip including at least one magneto-resistance sensor circuit. The position and orientation sensor package is constructed such that the at least one magneto-resistance sensor circuit of the first magneto-resistance sensor chip is oriented in a different direction than the at least one magneto-resistance sensor circuit of the second magneto-resistance sensor chip.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: June 12, 2018
    Assignee: General Electric Company
    Inventors: Kaustubh Ravindra Nagarkar, Peter William Lorraine
  • Patent number: 9605408
    Abstract: An electric motor that is fixed to a revolving frame, an electrical equipment that is supported by the revolving frame by using a vibration absorption mount, and a cable for establishing a connection between the electric motor and the electrical equipment are provided. A connector mounting member having an outer shape smaller than that of a box is provided in the box of the electrical equipment, and an equipment-side connector is provided in the connector mounting member. A cable-side connector of the cable is connected to the equipment-side connector, and a cable end portion of the cable is fixed to the box by a clamp member. As a result, the vibration that is transmitted to the cable can be matched with the vibration that is transmitted to the cable-side connector.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: March 28, 2017
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hidetoshi Satake, Takako Satake, Shinji Kato, Shuji Egawa, Takenori Hiroki, Toshihiko Watanabe, Yasunori Ota, Mitsugu Ojima
  • Patent number: 9589718
    Abstract: At least one shield member interposed between primary and secondary windings of a transformer and connected to the primary and/or secondary windings forms a distributed parasitic capacitance between the shield member and either the winding to which it is not connected or another shield member connected to that winding. Connections are made to the respective transformer windings such that the voltage distributions thus developed cause complementary common mode noise to be conducted in opposite directions in respective portions of the parasitic capacitance such that net common mode current can be made arbitrarily small without requiring that both sides of the distributed parasitic capacitance have complementary or equal voltage distributions. Such complementary common mode currents can be achieved by dividing opposing shield members or developing a voltage distribution in a single shield member in accordance with Faraday's Law.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: March 7, 2017
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Yuchen Yang, Daocheng Huang, Qiang Li, Fred C. Lee
  • Patent number: 9520793
    Abstract: A stacked magnetic power converter assembly includes a plurality of converter modules disposed in a stacked arrangement with respect to one another to define a thickness of stacked magnetic power converter assembly. Each converter module includes a primary switching unit, a secondary switching unit, and a converter unit. The converter unit includes a primary terminal in signal communication with the primary switching unit and a secondary terminal in signal communication with the secondary switching unit. Each primary switching unit, each secondary switching unit, and each converter unit is shared among the plurality of converter modules.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: December 13, 2016
    Assignee: RAYTHEON COMPANY
    Inventors: Boris S. Jacobson, Steven D. Bernstein
  • Patent number: 9307628
    Abstract: A circuit board assembly includes metal plates to be used as conducting medium, an encapsulation enclosing therein the metal plates and provided with holes defined in the encapsulation to allow extension of the metal plates out of the encapsulation for electrical connection and electronic components securely mounted on the encapsulation and electrically connected to the metal plates to form a closed loop.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: April 5, 2016
    Assignee: KING SHING INDUSTRIAL CO., LTD.
    Inventor: Chun-Chin Shin
  • Patent number: 9299492
    Abstract: A resonance-type non-contact power supply system includes a power-transmission-side metal shield to cover an area around a primary coil and a primary resonance coil, and a power-receiving-side metal shield to cover an area around a secondary coil and a secondary resonance coil, and when charging is performed, the power-transmission-side metal shield and the power-receiving-side metal shield are connected with a case connector to be at the same potential.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: March 29, 2016
    Assignee: Yazaki Corporation
    Inventors: Takahiro Nakahara, You Yanagida, Antony Ngahu
  • Patent number: 9197423
    Abstract: A network device comprises an interface coupling an electronic device to a differential pair of signal lines, and an integrated active common mode suppression and electrostatic discharge protection circuit coupled to the interface in parallel to differential signal lines of the electronic device. First and second resistors are respectively coupled to the differential lines between the integrated active common mode suppression and electrostatic discharge protection circuit and the electronic device.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: November 24, 2015
    Assignee: AKROS SILICON, INC.
    Inventors: Philip John Crawley, Amit Gattani, John R. Camagna, Jun Cai
  • Patent number: 9046562
    Abstract: Presented is a sensor that includes a magnetoresistive (MR) sensing device to sense a magnetic field and to produce an AC signal voltage proportional to the sensed magnetic field. The sensor also includes circuitry, coupled to the MR sensing device, to remove DC offset from the AC signal voltage. The DC offset may be related to the hysteresis characteristics of the MR sensing device. To remove DC offset, the circuitry may obtain an averaged DC offset and subtract the averaged DC offset from the AC signal voltage to produce a sensor output signal.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: June 2, 2015
    Assignee: Allegro Microsystems, LLC
    Inventors: John Cummings, William P. Taylor, David J. Haas
  • Patent number: 8994220
    Abstract: In a vehicle-mounted electronic control device having a switching power supply in which a switching element is controlled to obtain a predetermined intermediate voltage Va stepped down from a vehicle-mounted battery, and to which a downstream side coil, a flywheel diode, and an output capacitor are connected to suppress a pulsating voltage, a circuit for suppressing reverse conduction for the switching element is provided in order to prevent that the switching element is reversely conducted and thus a charging voltage of the output capacitor is abnormally lowered when a power supply voltage Vb of the vehicle-mounted battery is abnormally lowered.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: March 31, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuki Iwagami, Koji Hashimoto, Manabu Yamashita, Yuji Zushi, Mitsunori Nishida
  • Publication number: 20150069846
    Abstract: A magnetic shielding apparatus includes: a passive shield; a correction target space that is defined in the interior of the passive shield; external coils as a first coil that corrects a magnetic field in the passive shield; a first magnetic sensor; a second magnetic sensor that is arranged more inside the passive shield than the first magnetic sensor; and a control unit. The first magnetic sensor and the second magnetic sensor measure a magnetic field gradient in the passive shield. The control unit controls the external coils based on a result of the measurement performed by the first magnetic sensor and the second magnetic sensor.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 12, 2015
    Inventor: Ryuji HOKARI
  • Patent number: 8946935
    Abstract: A method for reducing electromagnetic interference radiated from a power supply arrangement. A plurality of switching mode power supply units are connected to an external device. Each switching mode power supply unit includes a ground point. The radiated electromagnetic interference is reduced by synchronizing a switching frequency of each switching mode power supply unit, such that all of the synchronized switching mode power supply units have an identical switching frequency, thereby reducing the difference in electric potential between the ground points. A corresponding power supply arrangement.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: February 3, 2015
    Assignee: SAAB AB
    Inventor: Bo Nettelblad
  • Patent number: 8946934
    Abstract: Low-cost connector apparatus for passing electrical signals from one device over another via a cable. In one embodiment, the connector apparatus comprises a coaxial type connector that mates with a host device, such as via the motherboard thereof. In one variant, the connector further comprises a plurality of electrical components including an integrated circuit adapted to condition (e.g., equalize) the signals being transmitted over the cable. The connector (and hence internal electrical components) is shielded so as to mitigate the effects of EMI or RFI on the host device circuitry itself. In another variant, the signals comprise IEEE-Std. 1394 “FireWire” high speed data signals, and the use of the shielded connector in the signal pathway allows the use of lower cost cabling than would otherwise be required with a non-shielded (non-integrated) connector.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: February 3, 2015
    Assignee: Autosplice, Inc.
    Inventors: Lawrence Dale Butts, Robert E. Fust, George Marc Simmel
  • Patent number: 8878392
    Abstract: An inductive power transmitter for transmitting electrical power to a device by electromagnetic induction, the transmitter being configured to receive power conductively by way of a current via an electrical conduit from an external power source, the transmitter including a field generator configured to generate a fluctuating electromagnetic field having a fundamental frequency; and at least one impedance element connected along an electrical path of the transmitter configured to carry said current, the impedance element or a combination of the impedance elements having a high enough impedance at the fundamental frequency such that, in use, electromagnetic noise experienced at the power source is substantially suppressed, such noise arising from coupling between the electromagnetic field and a circuit having said path and linking the power source to the transmitter.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: November 4, 2014
    Assignee: Access Business Group International LLC
    Inventor: Willy Henri Lemmens
  • Patent number: 8852728
    Abstract: There are provided a pattern exposure method, a conductive film producing method, and a conductive film, wherein a photosensitive material is subjected to a proximity exposure through a photomask disposed with a proximity gap of 70 to 200 ?m, and thereby is exposed in the mask pattern periodically in the conveying direction to obtain a conductive film. The conductive film has a plurality of conductive portions of first and second conductive thin metal wires and a plurality of opening portions. A side of each thin metal wire has a protrusion extending toward the opening portion from a virtual line representing a designed width of the thin metal wire, and the protruding amount of the protrusion is 1/25 to ? of the designed width.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: October 7, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Toyomi Matsuda, Makoto Sutou, Tomonori Baba, Daisuke Mitsuhashi
  • Patent number: 8847431
    Abstract: A semiconductor device includes a first circuit, a second circuit, a first wire, and a pair of shield lines. The first circuit includes a voltage generating circuit generating a predetermined voltage and produces the predetermined voltage at an output end thereof. The first wire connects the output end of the first circuit to an input end of the second circuit. The pair of shield lines is disposed so as to sandwich the first wire therebetween. One of the shield lines is supplied with a power supply potential for driving at least one of the voltage generating circuit and the second circuit. Another of the shield lines is supplied with a ground potential for driving at least one of the voltage generating circuit and the second circuit.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: September 30, 2014
    Assignee: PS4 Luxco S.A.R.L.
    Inventors: Taihei Shido, Mototsugu Fujimitsu, Nobuhiro Oodaira, Naoki Kitai
  • Patent number: 8795862
    Abstract: A battery pack that electrically connects a terminal cover, which is attached to a terminal base, and a battery pack case even if the terminal cover and case are not in direct contact with each other. The case is formed from a conductive material and accommodates a battery. The terminal base is formed from a non-conductive material and attached to the case. The terminal cover is formed from a conductive material and attached to the terminal base. A conductor formed from a conductive material comes in contact with both of the terminal cover and the case.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: August 5, 2014
    Assignee: Panasonic EV Energy Co., Ltd.
    Inventor: Shuhei Marukawa
  • Publication number: 20140167519
    Abstract: A plug connecting unit for connecting a cable circuit in a cable circuit housing with a sensor module in a sensor module housing, comprising a wireless interface for energy- and/or data transmission between the cable circuit and the sensor module. A first section of the wireless interface is arranged in the cable circuit and a second section of the wireless interface is arranged in the sensor module. The wireless interface is surrounded by a magnetic shielding and the magnetic shielding is arranged in the cable circuit housing and/or in the sensor module housing.
    Type: Application
    Filed: December 11, 2013
    Publication date: June 19, 2014
    Applicant: Endress + Hauser Conducta Gesellschaft fur Mess- und Regeltechnik mbH + Co. KG
    Inventor: Stefan Pilz
  • Publication number: 20140159498
    Abstract: Methods and apparatus for providing a system, such as a power conditioner unit, including terminals to receive three-phase signals, respective filter inductors, and respective filter capacitors that are switched into the EMI filter when the loading is above a given threshold.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 12, 2014
    Applicant: RAYTHEON COMPANY
    Inventor: Roland Torres
  • Publication number: 20140077612
    Abstract: A magnetic shielding device includes: a passive shield having an inner space; a first coil that cancels a magnetic field entering in the inner space; a first magnetic sensor that measures the magnetic field entering in the inner space; a second magnetic sensor located in a position farther from the first coil than the first magnetic sensor; and a controller that controls the first coil so that a gradient between a first magnetic field measured by the first magnetic sensor and a second magnetic field measured by the second magnetic sensor be less than a predetermined threshold.
    Type: Application
    Filed: September 17, 2013
    Publication date: March 20, 2014
    Applicant: Seiko Epson Corporation
    Inventors: Fumihiko Onuma, Shigemitsu Toda, Ryuji Hokari
  • Patent number: 8461667
    Abstract: A semiconductor device includes a semiconductor chip, and a guard ring made of an electrically conductive material and arranged between electrodes on the semiconductor chip and side edges of the semiconductor chip, the guard ring being divided by isolating sections on the semiconductor chip.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: June 11, 2013
    Assignee: Sumitomo Electric Device Innovations, Inc.
    Inventors: Takeshi Hishida, Tsutomu Igarashi
  • Patent number: 8415835
    Abstract: A plug-in power line conditioner is configured to receive an AC voltage from a circuit and insert a correction signal onto the circuit.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: April 9, 2013
    Assignee: The Invention Science Fund I, LLC
    Inventors: Roderick A. Hyde, Jordin T. Kare, Lowell L. Wood, Jr.
  • Patent number: 8247799
    Abstract: An integrated circuit for quantum computing may include a superconducting shield to limit magnetic field interactions.
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: August 21, 2012
    Assignee: D-Wave Systems Inc.
    Inventors: Paul I. Bunyk, Mark W. Johnson, Jeremy P. Hilton
  • Patent number: 8222769
    Abstract: A magnetic coupling type isolator includes: a magnetic field generator for generating an external magnetic field by an input signal; a magnetoresistive element for detecting the external magnetic field and converting the detected magnetic field into an electric signal, the magnetoresistive element being electrically insulated from the magnetic field generator and positioned in a location capable of being magnetically coupled so as to be overlapped with the magnetic field generator as seen in a top plan view; first and second shield films overlapped with the magnetic field generator and the magnetoresistive element as seen in a top plan view; and a third shield film disposed to surround the magnetoresistive element.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: July 17, 2012
    Assignee: Alps Green Devices Co., Ltd.
    Inventors: Yosuke Ide, Masamichi Saito, Akira Takahashi, Tsuyoshi Nojima, Yoshihiro Nishiyama, Hidekazu Kobayashi, Kenji Ichinohe, Naoki Sakatsume
  • Patent number: 8212413
    Abstract: An embodiment of the invention relates to a circuit assembly having the following components: a power transistor with a control terminal, a first load terminal and a second load terminal, the second load terminal having a floating potential; a driver circuit configured to generate control signals for the control terminal of the power transistor, the relevant reference potential for the driver circuit being the floating potential of the second load terminal; a planar metallization layer sited on or in a substrate and comprising a constant reference potential, a shielding plane isolated from the metallization layer, sited planar on or in the substrate such that it is capacitively coupled to the metallization layer; a power supply circuit for providing a supply voltage referenced to the floating potential of the second load terminal for the driver circuit, the power supply circuit comprising, circuited between the second load terminal and the shielding plane, a first series circuit including a first capacitor an
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: July 3, 2012
    Assignee: Infineon Technologies AG
    Inventors: Uwe Jansen, Ulrich Schwarzer, Reinhold Bayerer
  • Patent number: 8155271
    Abstract: The present embodiments related to a device having a device element to which a high voltage can be applied. The device is provided with at least one additional conducting element which is disposed, embodied and connected in such a way that the element is assigned a defined potential value and a change to the electric field generated by the high voltage in the sense of a more favorable field distribution is effected by means of position, shape and potential value. According to the invention, maximum loads on switching elements are avoided and undesirable phenomena such as voltage breakdowns or flow voltages are counteracted as a result of the more favorable field distribution.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: April 10, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Walter Beyerlein, Richard Eichhorn, Werner Kühnel, Sabine Missel
  • Publication number: 20120050015
    Abstract: Exemplary embodiments are directed to a device include a parasitic coil for protection of the device. A device may include a first circuit configured to receive a first transmitted signal at an operational frequency. The device may also include a second circuit a second circuit configured to generate a field that opposes at least one of an undesirable portion of a wireless power field of the first transmitted signal and a portion of another wireless power field proximate the first circuit, the another wireless power field generated by a second transmitted signal at a non-operational frequency of the first circuit.
    Type: Application
    Filed: March 2, 2011
    Publication date: March 1, 2012
    Applicant: QUALCOMM INCORPORATED
    Inventors: Zhen Ning Low, Charles E. Wheatley, III, Sergio P. Estrada
  • Patent number: 8049369
    Abstract: A controller for a power inverter having a gate assembly with an alternating current power output. A gate driver controls the activation of the gate assembly while a processor controls the operation of the gate driver. A current sensor has an output signal representative of the current at the power output. A noise detector circuit provides an output signal to the processor of the frequency of electromagnetic noise in the power inverter and the processor is programmed to sample the current from the current sensor at the frequency of the noise.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: November 1, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Hiroki Funato, Liang Shao, Kohji Maki, George Saikalis
  • Patent number: 7973334
    Abstract: The present invention provides an ESD device to reduce the total triggering current without increasing the overshoot voltage. This is achieved by localizing the triggering current, such that the local current density remains high enough to trigger the ESD device. This localized triggering provides a fast and efficient triggering of the ESD device.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: July 5, 2011
    Assignee: Sofics BVBA
    Inventors: Stefaan Verleye, Geert Wybo, Benjamin Van Camp
  • Patent number: 7964993
    Abstract: Embodiments disclosed herein describe a network device including a class AB common mode suppression (CMS) circuit coupled in parallel between a line voltage source and a physical layer (PHY) device that provides active EMI suppression and Phy device termination. A network connector is coupled to provide the line voltage source to the class AB CMS circuit. The class AB CMS circuit provides current to the PHY device, terminates open-drain transmit drivers of the PHY device and suppresses common mode noise thereby minimizing electromagnetic interference. In other embodiments, the class AB CMS circuit is coupled in parallel between the network connector and a physical layer (PHY) device. The class AB CMS circuit suppresses common mode noise, and terminates open-drain transmit drivers of the PHY device, thereby minimizing electromagnetic interference.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: June 21, 2011
    Assignee: Akros Silicon Inc.
    Inventors: Jun Cai, Amit Gattani
  • Publication number: 20100270865
    Abstract: A magnetic coupling type isolator includes: a magnetic field generator for generating an external magnetic field by an input signal; a magnetoresistive element for detecting the external magnetic field and converting the detected magnetic field into an electric signal, the magnetoresistive element being electrically insulated from the magnetic field generator and positioned in a location capable of being magnetically coupled so as to be overlapped with the magnetic field generator as seen in a top plan view; and first and second shield films overlapped with the magnetic field generator and the magnetoresistive element as seen in a top plan view, wherein a distance between the magnetoresistive element and the second shield film is set to 8 to 100 ?m.
    Type: Application
    Filed: April 5, 2010
    Publication date: October 28, 2010
    Applicant: ALPS ELECTRIC CO., LTD.
    Inventors: Yosuke IDE, Masamichi SAITO, Akira TAKAHASHI, Tsuyoshi NOJIMA, Yoshihiro NISHIYAMA, Hidekazu KOBAYASHI, Kenji ICHINOHE, Naoki SAKATSUME
  • Publication number: 20100270866
    Abstract: A magnetic coupling type isolator includes: a magnetic field generator for generating an external magnetic field by an input signal; a magnetoresistive element for detecting the external magnetic field and converting the detected magnetic field into an electric signal, the magnetoresistive element being electrically insulated from the magnetic field generator and positioned in a location capable of being magnetically coupled so as to be overlapped with the magnetic field generator as seen in a top plan view; first and second shield films overlapped with the magnetic field generator and the magnetoresistive element as seen in a top plan view; and a third shield film disposed to surround the magnetoresistive element.
    Type: Application
    Filed: April 5, 2010
    Publication date: October 28, 2010
    Applicant: ALPS ELECTRIC CO., LTD.
    Inventors: Yosuke IDE, Masamichi SAITO, Akira TAKAHASHI, Tsuyoshi NOJIMA, Yoshihiro NISHIYAMA, Hidekazu KOBAYASHI, Kenji ICHINOHE, Naoki SAKATSUME
  • Patent number: 7786621
    Abstract: Circuit arrangement and method for reducing electromagnetic interference. The circuit arrangement includes a supply potential connection, a reference-ground potential connection, a controllable impedance element, a signal generator, and a circuit unit. The controllable impedance element is connected between the supply potential connection and the reference-ground potential connection, and has a control connection for receiving a control signal for controlling the impedance of the impedance element. The signal generator is coupled to the control connection of the impedance element. The circuit unit is connected between the supply potential connection and the reference-ground potential connection, and originates the electromagnetic interference during operation. The signal generator is designed to produce the control signal, which varies over time, in such a manner that the electromagnetic interference which originates from the circuit unit during operation is changed.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: August 31, 2010
    Assignee: Qimonda AG
    Inventor: Mojtaba Joodaki
  • Patent number: 7687935
    Abstract: An electrical power control system for use with a recreational vehicle or similar load to selectively control power thereto from either a utility power source or a generator power source comprising a power control stage coupled to the utility power source and the generator power source by a power supply stage to operate the electrical power control system and a utility/generator switch arrangement to selectively direct the power from either the utility power source or the generator power source to the recreational vehicle and wherein the power control stage monitors polarity, phase and voltage levels and controls the utility/generator switch arrangement to selectively feed power from either the utility power source or the generator power source to the recreational vehicle under a predetermined plurality of operating parameters or conditions and fault conditions.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: March 30, 2010
    Inventor: David Bailey
  • Patent number: 7687938
    Abstract: An integrated circuit for quantum computing may include a superconducting shield to limit magnetic field interactions.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: March 30, 2010
    Assignee: D-Wave Systems Inc.
    Inventors: Paul I. Bunyk, Mark W. Johnson, Jeremy P. Hilton
  • Publication number: 20100013318
    Abstract: A printed circuit board includes a ground layer, a power source layer, a signal wiring layer, an insulating layer and an electromagnetic radiation suppressing member. The power source layer is provided to be opposed to the ground layer. The signal wiring layer transmits a signal in a predetermined frequency domain. The insulating layer insulates the ground layer, the power source layer and the signal wiring layer from one another. The electromagnetic radiation suppressing member is provided to cover a circumferential edge of the insulating layer. The electromagnetic radiation suppressing member has a negative dielectric constant and a positive magnetic permeability in a frequency domain including the predetermined frequency domain.
    Type: Application
    Filed: July 13, 2009
    Publication date: January 21, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Daisuke Iguchi, Kanji Otsuka, Yutaka Akiyama
  • Patent number: 7501721
    Abstract: A reduced-noise switching power supply includes a conductive surface disposed transversely in an air space between a line filter system component and a switching system component. The conductive surface does not encase either the line filter system component or the switching system component.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: March 10, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Rick Geveshausen, Rick Shaw
  • Patent number: 7498696
    Abstract: In some embodiments, a voltage grading and shielding method for a high voltage component, is provided. In some embodiments, the method includes configuring at least one first track constructed of a metal or an alloy, at a first location predetermined from the mounting position of the high voltage component, and at least one second track constructed of a metal or an alloy thereof, at a second location predetermined along the length of the high voltage component. In some embodiments, the configured at least one first track substantially reduces the stray capacitance effect and the at least one second track produces a substantially linear voltage distribution along the length of the high voltage component.
    Type: Grant
    Filed: November 20, 2004
    Date of Patent: March 3, 2009
    Assignee: General Electric Company
    Inventor: Senthil Kumar Sundaram
  • Publication number: 20090039710
    Abstract: The present embodiments related to a device having a device element to which a high voltage can be applied. The device is provided with at least one additional conducting element which is disposed, embodied and connected in such a way that the element is assigned a defined potential value and a change to the electric field generated by the high voltage in the sense of a more favorable field distribution is effected by means of position, shape and potential value. According to the invention, maximum loads on switching elements are avoided and undesirable phenomena such as voltage breakdowns or flow voltages are counteracted as a result of the more favorable field distribution.
    Type: Application
    Filed: July 3, 2008
    Publication date: February 12, 2009
    Inventors: Walter Beyerlein, Richard Eichhorn, Werner Kuhnel, Sabine Missel
  • Patent number: 7475495
    Abstract: The current invention relates to a clothes dryer having a dryness sensing device and method of use comprising at least two electrically conductive sensor bars placed closely together but not touching one another so that articles in the dryer can contact two of the sensor bars at the same time. At least one sensor bar is electrically connected to an electrical current source and at least one sensor bar is electrically connected to an electrical ground. A microcontroller is electrically connected between the electrical current source and the electrical ground so as to be capable of measuring the voltage across the sensor bars when the sensor bars are contacted by the articles being dried. The microcontroller is configured so as to determine the dryness of the articles by calculating the electrical resistance of the articles by using the value of the voltage across the sensor bars and the value of the current through the sensor bars.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: January 13, 2009
    Assignee: Maytag Corporation
    Inventors: Howell H. Chiles, Timothy E. White
  • Publication number: 20080190660
    Abstract: A magnetic induction protecting structure comprises a platform, an induction ruler, an induction head and a protection assembly. The protection assembly covers an induction distance between the induction head and the induction ruler completely for scraping off the chips and dust on the induction ruler and to prevent the chips and dust from being fallen into or accumulated in the induction distance, so as to ensure the quality of the magnetic induction signals between the induction head and the induction ruler, and to prolong the life of the induction head and the induction ruler.
    Type: Application
    Filed: February 8, 2007
    Publication date: August 14, 2008
    Inventors: Ming-Chih HUANG, Chih-Mao Shiao
  • Publication number: 20080169187
    Abstract: An electrical circuit for reducing electromagnetic fields in a vicinity of an electrolyzer, including an electrolyzer and an electrical line including at least one busbar for returning the current flowing through the electrolyzer, and a power supply of at least two rectifiers for delivering currents whose waveforms are phase-shifted with respect to each other.
    Type: Application
    Filed: March 1, 2006
    Publication date: July 17, 2008
    Applicant: Solvay (Societe Anonmme)
    Inventor: Joachim Lange
  • Publication number: 20080143189
    Abstract: An electrical circuit for reducing electromagnetic fields in a vicinity of an electrolyzer, including a primary circuit supplying the electrolyzer and a secondary electrical circuit arranged in the vicinity of the primary circuit, for a current to flow in the opposite direction to that current flowing in the main circuit to compensate for electromagnetic fields generated by the main circuit.
    Type: Application
    Filed: February 27, 2006
    Publication date: June 19, 2008
    Applicant: Solvay (Societe Anonyme)
    Inventor: Joachim Lange
  • Patent number: 7336556
    Abstract: A non-volatile magnetic memory device is proposed, which provides sufficient magnetic shielding performance for external magnetic fields. A first magnetic shield layer 60a and a second magnetic shield layer 60b, both made of a soft magnetic metal, are formed respectively on the bottom surface of the transistor section 20, which is the mounting side of the MRAM device 10, and on the top surface of the bit line 50, which is opposite to the bottom surface of the mounting side of the MRAM device 10. On the second magnetic shield layer 60a, a passivation film 70 is formed. The magnetic flux penetrated from the external magnetic field, is suppressed below the inversion strength of the MRAM device 10, thereby improving reliability.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: February 26, 2008
    Assignee: Sony Corporation
    Inventors: Katsumi Okayama, Kaoru Kobayashi, Makoto Motoyoshi
  • Patent number: 6819013
    Abstract: An electrically isolated, combined power and signal coupler, for a patient connected device, is disclosed. A docking station and a portable device, capable of docking with the docking station each include a power coupler and an electrically isolated data transducer. The respective power couplers include a magnetically permeable element including a central pole and a peripheral pole and a printed circuit board with an opening through which the central pole protrudes. The printed circuit board includes windings surrounding the central pole opening: a primary winding in the docking station and a secondary winding in the portable device. When the portable device is docked with the docking station, the magnetically permeable element in the portable device and the magnetically permeable element in the docking station are arranged to form a magnetic circuit, and the data transducer in the portable device and the data transducer in the docking station are arranged to exchange data.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: November 16, 2004
    Assignee: Draeger Medical Systems, Inc.
    Inventors: Clifford Mark Kelly, Scott Newell, Tomas Russ
  • Publication number: 20040164620
    Abstract: The electronic system generally includes an electronic panel having circuitry plated on a surface thereof as well as electronic components attached thereto. The circuitry connects the electronic components for operation of the electronic device in the engine compartment. A flatwire bus electronically connects the electronic panel and the electronic device in the engine compartment for transmitting signals there between. The electronic panel is directly connected to the bulkhead.
    Type: Application
    Filed: February 21, 2003
    Publication date: August 26, 2004
    Applicant: Visteon Global Technologies, Inc.
    Inventors: Lawrence Kneisel, Myron Lemecha, Andrew Glovatsky
  • Patent number: 6768226
    Abstract: A measuring circuit capable of performing a high-accuracy measurement by eliminating inductive influence from an ambient noise voltage source. An electric circuit including a signal circuit of high impedance, a wiring conductor and a meter is provided with a shielding resistance member having a significantly lower resistance than that of the signal circuit in dependence on an inter-terminal voltage of the high impedance signal circuit and a shield formed of an electrically conductive material disposed in association with the wiring conductor. A voltage distribution function of the shielding resistance member is matched equally to that of an inter-terminal voltage distribution function of the signal circuit. By measuring a line voltage through the medium of the high impedance signal circuit shielded by the shielding resistor, high accuracy measurement can be realized without undergoing adverse influences of parasitic capacitance and induction.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: July 27, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Watanabe, Kazuo Kato
  • Patent number: 6720677
    Abstract: Power lines include three or more conductors for transmitting alternating currents. The conductors are arranged in one combination of the conductor arrangement so that the sum of phase differences between the currents flowing through adjacent conductors is maximum, and if there exists a plurality of such combinations, the one combination is selected in which the value of the smallest one of the phase differences between the currents flowing through every adjacent conductor is largest. With this arrangement, power loss is reduced.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: April 13, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Kazuo Shima, Miyoshi Takahashi, Masaki Sato