Patents by Inventor Thomas Durbaum

Thomas Durbaum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9502921
    Abstract: The invention relates to a circuit for a system for contactless, inductive power transmission, in particular for use in supplying power to mobile devices, and to an associated charging circuit. The circuit comprises a primary-side circuit, which is disposed on a primary side and can be connected to a primary-side supply voltage, and a secondary-side circuit, which is disposed on a secondary side and can be connected to a load to be supplied with power. Furthermore a transformer stage having galvanic isolation is provided for the contactless transfer of power from the primary side over an air gap to the secondary side, wherein at least two magnetically coupled coils are provided for inductive power transmission and can be spatially separated from one another by distancing the secondary side from the primary side. The transformer stage has a resonant converter and the secondary-side circuit further comprises a restabilization stage.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: November 22, 2016
    Assignee: FRIEDRICH-ALEXANDER-UNIVERSITÄT ERLANGEN-NÜRNBERG
    Inventors: Alexander Bucher, Thomas Durbaum
  • Publication number: 20130187595
    Abstract: The invention relates to a circuit for a system for contactless, inductive power transmission, in particular for use in supplying power to mobile devices, and to an associated charging circuit. The circuit comprises a primary-side circuit, which is disposed on a primary side and can be connected to a primary-side supply voltage, and a secondary-side circuit, which is disposed on a secondary side and can be connected to a load to be supplied with power. Furthermore a transformer stage having galvanic isolation is provided for the contactless transfer of power from the primary side over an air gap to the secondary side, wherein at least two magnetically coupled coils are provided for inductive power transmission and can be spatially separated from one another by distancing the secondary side from the primary side. The transformer stage has a resonant converter and the secondary-side circuit further comprises a restabilisation stage.
    Type: Application
    Filed: May 27, 2011
    Publication date: July 25, 2013
    Applicants: Friedrich-Alexander-Universitat Erlangen-Nurnberg, Friwo Geratebau GMBH
    Inventors: Alexander Bucher, Thomas Durbaum
  • Patent number: 7915991
    Abstract: Conventional transformers with fractional turns have pre-manufactured cores usually with a complicated structure. According to the present invention, a method is provided of manufacturing a planar transformer where a ferrite polymer compound is laminated to a PCB for forming the core of the transformer. Advantageously, this may allow for the provision of a cheap and robust transformer.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: March 29, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Eberhard Waffenschmidt, Thomas Dürbaum
  • Patent number: 7907010
    Abstract: Recently, the use of class-D audio amplifiers has become more and more widespread. In contrast to the generally employed class-AB linear amplification technology, class-D allows for improved efficiency. However, the class-D principle is known for its poor distortion characteristics. According to the present invention a digital amplifier (18) is provided for converting an audio signal to a power output, comprising a ripple suppression circuit (16) for suppressing voltage ripples in a supply voltage supplied to the bridge circuit with (6) at least one pair of switches. The ripple suppression circuit (16) suppresses ripples in the supply voltage supplied to a switch in the bridge circuit (6), which has been found to cause a major part of the distortions in the output signal of the digital amplifier (18).
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: March 15, 2011
    Assignee: NXP B.V.
    Inventors: Matthias Wendt, Iain Mosely, F. Javier Esguevillas, Thomas Dürbaum, Georg Sauerländer, Heinz Van Der Broeck
  • Patent number: 7839132
    Abstract: A power converter comprising an inductor for receiving energy from a power supply, and connected to the inductor an output capacitor for providing an output voltage. In order to ensure a quick compensation of a reduction of load at the voltage output using few output capacitors, an additional current path is arranged in parallel either to the inductor or to the capacitor, which additional current path can be opened and closed. A current flowing through the additional current path reaches basically immediately a desired value, when the additional current path is opened. Feedback means are moreover provided for opening the additional current path, when the output voltage reaches a predetermined maximum value.
    Type: Grant
    Filed: November 5, 2003
    Date of Patent: November 23, 2010
    Assignee: NXP B.V.
    Inventors: Thomas Dürbaum, Reinhold Elferich, Tobias G. Tolle, Jeffery Olsen
  • Patent number: 7602229
    Abstract: Resonant gate driver circuits provide for efficient switching of, for example, a MOSFET. However, often an operation of the resonant gate driver circuit does not allow for an application where high switching frequencies are required. According to the present invention, a pre-charging of the inductor of the resonant gate driver circuit is performed. This allows for a highly efficient and fast operation of the MOSFETs.
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: October 13, 2009
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Tobias Georg Tolle, Thomas Dürbaum, Georg Sauerländer, Toni Lopez
  • Patent number: 7579900
    Abstract: Since parallel MOSFETs are usually driven with one gate signal in power applications, the current sharing between the MOSFETs is automatically established with regard to the characteristics of the individual MOSFETs. This may lead to a large non-uniformity of the current distribution between the MOSFETs. According to the present invention, an individual control of the on-resistances of the MOSFETs is provided, which allows for an improved current sharing between paralleled MOSFETs.
    Type: Grant
    Filed: August 9, 2004
    Date of Patent: August 25, 2009
    Assignee: NXP B.V.
    Inventor: Thomas Dürbaum
  • Patent number: 7538554
    Abstract: An MR apparatus has a resonant circuit, which is formed by an MR receiving coil (L1) and a capacitor (C1), and has an electronic control circuit (S) for switching the resonant circuit between two or more operating modes. The invention proposes that the electronic control circuit (S) be connected with a receiving device (L2) for wireless reception of a high-frequency electromagnetic control signal.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: May 26, 2009
    Assignee: Koninlijke Philips Electronics N.V.
    Inventors: Matthias Wendt, Thomas Dürbaum, Achim Hilgers, Rainer Kiewitt, Heiko Pelzer
  • Publication number: 20080203823
    Abstract: The invention relates to an arrangement for converting mechanical energy into electrical energy comprising a piezo-electric auxiliary generator producing an auxiliary voltage and a main generator which is coupled mechanically with the auxiliary generator and producing the electrical energy.
    Type: Application
    Filed: April 21, 2006
    Publication date: August 28, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N. V.
    Inventors: Carsten Deppe, Thomas Durbaum
  • Patent number: 7408270
    Abstract: Usually, power supplies are not capable of switching off part of the outputs of a main power supply during stand-by. Due to this, stand-by power supplies are used in addition to operation power supplies. Consistent with an example embodiment, a forward converter is provided, including switches in the rectifier circuit thereof. Due to this, the rectifier circuits may be selectively switched on and off. Advantageously, this may allow that the main outputs of such a forward converter are switched off while on stand-by.
    Type: Grant
    Filed: October 28, 2004
    Date of Patent: August 5, 2008
    Assignee: NXP B.V.
    Inventors: Thomas Dürbaum, Georg Sauerländer, Cornelis Johannes Adrianus Schetters
  • Publication number: 20080150609
    Abstract: Since parallel MOSFETs are usually driven with one gate signal in power applications, the current sharing between the MOSFETs is automatically established with regard to the characteristics of the individual MOSFETs. This may lead to a large non-uniformity of the current distribution between the MOSFETs. According to the present invention, an individual control of the on-resistances of the MOSFETs is provided, which allows for an improved current sharing between paralleled MOSFETs.
    Type: Application
    Filed: August 9, 2004
    Publication date: June 26, 2008
    Inventor: Thomas Durbaum
  • Patent number: 7330046
    Abstract: Power conversion circuits often consist of several MOSFETs operating in parallel. Due to thermal cycling and mechanical operations. MOSFETs or the respective electric connections of the MOSFETs may fail. For certain implementations, a diagnosis circuit for a plurality of parallel MOSFETs predicts or determines a possible failure on the basis of at least one of temperatures of the MOSFETs or gate voltages of the MOSFETs. In some applications, the MOSFETs are monitored to facilitate early determination of failures of the MOSFETs.
    Type: Grant
    Filed: August 20, 2004
    Date of Patent: February 12, 2008
    Assignee: NXP B.V.
    Inventor: Thomas Dürbaum
  • Publication number: 20080024322
    Abstract: It is proposed that passive wireless transponder systems used in the context of procedures for access identification be provided with signaling that can be perceived by human beings. This also makes it possible to detect that a relay attack, which is difficult to prevent, is being carried out. Attention is also drawn to other types of manipulative interference with the communication and to certain problems with the high-frequency transmission. By the employment of comparatively inexpensive and highly reliable means, this near-simultaneous perception of an identifying process for access purposes produces a very effective reduction in such threats to the security of the system. Other simple measures may have an advantageous effect in connection therewith. The signaling may also assist an ergonomic process. For example, an automobile entry or access system that is not specifically actuated, referred to as a passive keyless entry system, may be improved.
    Type: Application
    Filed: June 17, 2004
    Publication date: January 31, 2008
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Karl-Ragmar Riemschneider, Horst Roehm, Matthias Wendt, Thomas Durbaum, Achim Hilgers, Rainer Pietig, Heiko Pelzer
  • Publication number: 20070268018
    Abstract: The invention relates to a circuit arrangement for an MR apparatus, having a resonant circuit, which is formed by an MR receiving coil (L1) and a capacitor (C1), and having an electronic control circuit (S) for switching the resonant circuit between two or more operating modes. The invention proposes that the electronic control circuit (S) be connected with a receiving device (L2) for wireless reception of a high-frequency electromagnetic control signal.
    Type: Application
    Filed: November 24, 2004
    Publication date: November 22, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS NV
    Inventors: Matthias Wendt, Thomas Durbaum, Achim Hilgers, Rainer Kiewitt, Heiko Pelzer
  • Patent number: 7259363
    Abstract: A control unit (2) of a remote control receiver sets the forward or reverse direction operating mode of the photodiode (1) as a function of the useful signal level of its output signal, and to be precise, during standby, the photovoltaic operating mode (forward mode), since in this mode no external bias current is required. If the useful signal level of the photodiode (1) exceeds a predefined threshold, the reverse mode is set, and this brings with it a higher sensitivity. A series circuit (A) of a number of identical photodiodes DA1 DAn the forward mode allows the realization of a controlled current source (6) having a transistor (T), since the permissible diode voltage (Ud) of the overall arrangement may have n times the value of the operating voltage of an individual photodiode. Thus at the same time the voltage across the individual diodes can be set to a very low value and a favorable operating range for the current source can be set.
    Type: Grant
    Filed: December 15, 2003
    Date of Patent: August 21, 2007
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Carsten Deppe, Thomas Dürbaum, Georg Sauerländer
  • Publication number: 20070164814
    Abstract: Recently, the use of class-D audio amplifiers has become more and more widespread. In contrast to the generally employed class-AB linear amplification technology, class-D allows for improved efficiency. However, the class-D principle is known for its poor distortion characteristics. According to the present invention a digital amplifier (18) is provided for converting an audio signal to a power output, comprising a ripple suppression circuit (16) for suppressing voltage ripples in a supply voltage supplied to die bridge circuit with (6) at least one pair of switches. The ripple suppression circuit (16) suppresses ripples in die supply voltage supplied to a switch in the bridge circuit (6), which has been found to cause a major part of the distortions in the output signal of the digital amplifier (18).
    Type: Application
    Filed: March 25, 2004
    Publication date: July 19, 2007
    Inventors: Matthias Wendt, Iain Mosely, F. Esguevillas, Thomas Durbaum, Georg Sauerlander, Heinz Van Der Broeck
  • Patent number: 7239114
    Abstract: Described herein is a DC/DC down converter which includes a synchronous rectifier, a switching element at its input side, an inductance at its output side and an auxiliary circuit which includes an auxiliary switching element, an auxiliary rectifier and an auxiliary inductance, the auxiliary circuit being coupled to the connection between the synchronous rectifier, the switching element at the input side and the inductance at the output side.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: July 3, 2007
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Thomas Dürbaum, Reinhold Elferich, Tobias Tolle
  • Publication number: 20070069582
    Abstract: Usually, power supplies are not capable of switching off part of the outputs of a main power supply during stand-by. Due to this, stand-by power supplies are used in addition to operation power supplies. According to the present invention, a forward converter is provided, including switches in the rectifier circuit thereof. Due to this, the rectifier circuits may be selectively switched on and off. Advantageously, this may allow that the main outputs of such a forward converter are switched off while on stand-by.
    Type: Application
    Filed: October 28, 2004
    Publication date: March 29, 2007
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Thomas Durbaum, Georg Sauerlander, Cornelis Johannes Schetters
  • Patent number: 7190596
    Abstract: In a switching DC converter with a resonant circuit output stage, the energy remaining in the resonant circuit for switching the switches of the converter in an inductive mode of operation is used to control the phase of switching. The turn-on phase of each switch is controlled to assure zero voltage switching, and the turn-off phase of each switch is controlled to assure that the resonant circuit has sufficient energy to provide this zero voltage switching.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: March 13, 2007
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Thomas Dürbaum, Georg Sauerländer
  • Publication number: 20070030107
    Abstract: Conventional transformers with ractional turns have pre-manufactured cores usually with a complicated structure. According to the present invention, a method is provided of manufacturing a planar transformer where a ferrite polymer compound is laminated to a PCB for forming the core of the transformer. Advantageously, this may allow for the provision of a cheap and robust transformer.
    Type: Application
    Filed: August 24, 2004
    Publication date: February 8, 2007
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Eberhard Waffenschmidt, Thomas Dürbaum