Patents by Inventor Horst Knoedgen

Horst Knoedgen 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: 10477634
    Abstract: A solid state lighting SSL assembly comprises an SSL device, a capacitor, a directional conducting device and a supply switch. The capacitor is coupled in parallel with the SSL device. The directional conducting device is coupled between an output terminal of the capacitor and a supply terminal which provides a supply voltage for the SSL assembly. The directional conducting device is configured to conduct in a direction from the output terminal to the supply terminal and to isolate in the opposite direction. The supply switch is coupled between the output terminal and ground. In addition, a method for operating a solid state lighting SSL assembly is proposed.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: November 12, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Kaiwen He, Horst Knoedgen, Baorong Chen, Julian Tyrrell
  • Patent number: 10469065
    Abstract: A circuit for operating a transistor device that acts as a switch is presented. The circuit includes the transistor device and a control circuit coupled to a gate of the transistor device. The control circuit is adapted to selectively apply at least a first voltage level, a second voltage level, and a third voltage level to the gate of the transistor device, wherein the first, second, and third voltage levels are distinct voltage levels. The disclosure further relates to a method of operating a transistor device that acts as a switch. The proposed circuit provides additional gate voltages, by contrast to conventional two-level gate drivers. By appropriate choice of the additional gate voltages, reverse mode conductance losses of the transistor device can be reduced and/or to the Safe Operating Area (SOA) of the transistor device can be improved.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: November 5, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Christoph N. Nagl, Nebojsa Jelaca, Frank Kronmueller, Ambreesh Bhattad
  • Patent number: 10439528
    Abstract: An actuation system is proposed for an optical system, comprising a voice coil motor for actuating the optical system, the voice coil motor comprising a magnet and an electric coil, a position measuring unit for measuring the position of the electric coil and providing a position feedback signal, and a control unit for closed loop control of the position of the optical system based on a target position and the position feedback signal, used for generating a drive signal for the electric coil. According to the disclosure, a ferromagnetic element is arranged in proximity to the electric coil so that the inductance of the electric coil depends on its position. Further, the position-measuring unit measures the inductance of the electric coil and determines the position of the electric coil based on the determined inductance.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: October 8, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Horst Schleifer
  • Publication number: 20190273487
    Abstract: A circuit for operating a transistor device that acts as a switch is presented. The circuit includes the transistor device and a control circuit coupled to a gate of the transistor device. The control circuit is adapted to selectively apply at least a first voltage level, a second voltage level, and a third voltage level to the gate of the transistor device, wherein the first, second, and third voltage levels are distinct voltage levels. The disclosure further relates to a method of operating a transistor device that acts as a switch. The proposed circuit provides additional gate voltages, by contrast to conventional two-level gate drivers. By appropriate choice of the additional gate voltages, reverse mode conductance losses of the transistor device can be reduced and/or to the Safe Operating Area (SOA) of the transistor device can be improved.
    Type: Application
    Filed: March 1, 2018
    Publication date: September 5, 2019
    Inventors: Horst Knoedgen, Christoph N. Nagl, Nebojsa Jelaca, Frank Kronmueller, Ambreesh Bhattad
  • Patent number: 10381828
    Abstract: An overvoltage protection circuit for a transistor device is presented. The overvoltage protection circuit comprises a first pin coupled to a gate terminal of the transistor device, an electrostatic discharge protection circuit coupled between a second pin and a source terminal of the transistor device, a first diode coupled between the first pin and the second pin, and a second diode coupled in parallel to the first diode between the first pin and the second pin. The forward direction of the first diode is opposite to the forward direction of the second diode. In addition, A method of measuring a gate leakage current of a transistor device and a method of bonding a transistor device coupled to such an overvoltage protection circuit are presented.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: August 13, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Christoph N. Nagl, Nebojsa Jelaca
  • Publication number: 20190237967
    Abstract: An overvoltage protection circuit for a transistor device is presented. The overvoltage protection circuit comprises a first pin coupled to a gate terminal of the transistor device, an electrostatic discharge protection circuit coupled between a second pin and a source terminal of the transistor device, a first diode coupled between the first pin and the second pin, and a second diode coupled in parallel to the first diode between the first pin and the second pin. The forward direction of the first diode is opposite to the forward direction of the second diode. In addition, A method of measuring a gate leakage current of a transistor device and a method of bonding a transistor device coupled to such an overvoltage protection circuit are presented.
    Type: Application
    Filed: January 29, 2018
    Publication date: August 1, 2019
    Inventors: Horst Knoedgen, Christoph N. Nagl, Nebojsa Jelaca
  • Patent number: 10334667
    Abstract: A controller for a power converter to convert electrical power at an input voltage into electrical power at an output voltage and a method of operating such controller is presented. The controller for controlling a power converter has an input port to receive a voltage representative of the input voltage; an input voltage measuring unit to sample a measuring voltage and to determine a measurement value that is representative of the input voltage; a switch; and a diode connectable with a storage unit to provide a supply voltage for the controller during operation of the controller. The switch controls the charging of the storage unit from the voltage at the input port.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: June 25, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Julian Tyrrell
  • Patent number: 10333408
    Abstract: A half bridge circuit and a method for its operation are presented. The half bridge circuit contains a high-side switch, a latch for providing a drive signal for the high-side switch, a first transistor device acting as a level shifter for shifting a voltage level at an input of the latch. The first transistor device is coupled between a supply voltage level and ground, and the voltage level at the input of the latch is shifted in accordance with a current that flows through the first transistor device. A second transistor device is coupled between the supply voltage level and ground, in parallel to the first transistor device. There is a current mirror for mirroring a current that flows through the second transistor device. There is a circuit path for feeding the mirrored current to an intermediate node between the supply voltage level and the first transistor device.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: June 25, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Christoph N. Nagl, Nebojsa Jelaca, Frank Kronmueller, Ambreesh Bhattad
  • Patent number: 10298112
    Abstract: A circuit for driving a power switch is presented. The circuit includes a first power switch coupled to a second power switch via a switching node and a driver coupled to the first power switch, where the driver contains an energy storing element coupled to the switching node. The circuit also contains a sensor to sense an electrical parameter of the driver and a charger coupled to the sensor. The charger provides a charge current to charge the energy storage element, and to control the charge current based on the electrical parameter. In particular, a circuit for driving a power switch based on a III/V semiconductor is presented. In addition, a method of powering a power switch driver is presented. The method includes sensing an electrical parameter of the driver and adjusting a current to charge the energy storing element based on the electrical parameter.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: May 21, 2019
    Assignees: Dialog Semiconductor, Inc., Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Christoph Nagl, Nebojsa Jelaca, Kun Yang, Jung Woo Choi
  • Patent number: 10284078
    Abstract: A method and apparatus for limiting or preventing electromagnetic interferences in a switching converter are presented. In particular, a power circuit provided with an active electromagnetic interference filter is presented. There is an electromagnetic interference EMI reduction circuit for use with a switching converter. This EMI reduction circuit has a current source and is adapted to regulate a voltage across the current source to provide a current having a constant average value. The switching converter is adapted to provide a converter current, and the current source constant average value may be substantially equal to an average value of the converter current. The circuit has a variable resistance; and an adjuster adapted to adjust the variable resistance based on the converter current. The adjuster may have a comparator, which is adapted to compare a voltage value at a terminal of a transistor switch, and a reference value.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: May 7, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Christoph N. Nagl, Nebojsa Jelaca
  • Publication number: 20190103804
    Abstract: A circuit for driving a power switch is presented. The circuit includes a first power switch coupled to a second power switch via a switching node and a driver coupled to the first power switch, where the driver contains an energy storing element coupled to the switching node. The circuit also contains a sensor to sense an electrical parameter of the driver and a charger coupled to the sensor. The charger provides a charge current to charge the energy storage element, and to control the charge current based on the electrical parameter. In particular, a circuit for driving a power switch based on a III/V semiconductor is presented. In addition, a method of powering a power switch driver is presented. The method includes sensing an electrical parameter of the driver and adjusting a current to charge the energy storing element based on the electrical parameter.
    Type: Application
    Filed: September 29, 2017
    Publication date: April 4, 2019
    Inventors: Horst Knoedgen, Christoph Nagl, Nebojsa Jelaca, Kun Yang, Jung Woo Choi
  • Publication number: 20190097624
    Abstract: An electronic circuit provided with a III/V semiconductor domain, and a method of operating such a circuit is presented. In particular, the present application relates to electronic circuit based on a Gallium Nitride (GaN) semiconductor. GaN components must be controlled in a way that ensures proper operation over a wide variation of GaN parameters. There is a circuit comprising a first domain coupled to a second domain, the first domain being based on a III/V semiconductor; wherein the first domain comprises a first component and a second component. The second component being representative of an electrical characteristic of the first component. The second domain contains a sensor adapted to sense an electrical quantity of the second component and an input generator coupled to the sensor. The input generator is adapted to provide at least one input, based on the electrical quantity, to the first domain.
    Type: Application
    Filed: September 25, 2017
    Publication date: March 28, 2019
    Inventors: Christoph Nagl, Nebojsa Jelaca, Horst Knoedgen
  • Patent number: 10243451
    Abstract: A circuit and method for regulating an internal power supply of a switching converter is presented. A switching converter with a depletion mode power switch coupled to an enhancement mode power switch via a switching node and an energy storing element coupled to the depletion mode power switch is provided. The energy storing element may be adapted to provide energy to the switching converter. For instance, the energy storing element may be a capacitor. Optionally, the switching converter may comprise an inductor coupled to the depletion mode transistor, the inductor being adapted to provide an inductor current.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: March 26, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Christoph N. Nagl, Nebojsa Jelaca
  • Patent number: 10218258
    Abstract: A method and apparatus for driving a power stage is presented. In particular, the power stage is a half-bridge. In the method, there is a first power switch coupled to a second power switch via a switching node. The method steps include sensing a first control-terminal voltage of one of the first power switch and the second power switch and turning on the first power switch based on the first control-terminal voltage and sensing a second control-terminal voltage of one of the first power switch and the second power switch and turning on the second power switch based on the second control-terminal voltage. Optionally, the first power switch is turned on when the first control-terminal voltage has reached a first threshold value, and the second power switch is turned on when the second control-terminal voltage has reached a second threshold value.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: February 26, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Christoph N. Nagl, Horst Knoedgen, Nebojsa Jelaca
  • Publication number: 20190058423
    Abstract: An actuation system is proposed for an optical system, comprising a voice coil motor for actuating the optical system, the voice coil motor comprising a magnet and an electric coil, a position measuring unit for measuring the position of the electric coil and providing a position feedback signal, and a control unit for closed loop control of the position of the optical system based on a target position and the position feedback signal, used for generating a drive signal for the electric coil. According to the disclosure, a ferromagnetic element is arranged in proximity to the electric coil so that the inductance of the electric coil depends on its position. Further, the position-measuring unit measures the inductance of the electric coil and determines the position of the electric coil based on the determined inductance.
    Type: Application
    Filed: August 17, 2018
    Publication date: February 21, 2019
    Inventors: Horst Knoedgen, Horst Schleifer
  • Patent number: 10206253
    Abstract: A controller for a power converter to convert electrical power at an input voltage into electrical power at an output voltage and a method of operating such controller is presented. The controller for controlling a power converter has an input port to receive a voltage representative of the input voltage; an input voltage measuring unit to sample a measuring voltage and to determine a measurement value that is representative of the input voltage; a switch; and a diode connectable with a storage unit to provide a supply voltage for the controller during operation of the controller. The switch controls the charging of the storage unit from the voltage at the input port.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: February 12, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Julian Tyrrell
  • Patent number: 10185347
    Abstract: A circuit arrangement comprising a first capacitor and a second capacitor which are arranged in series between a high potential and a low potential is described. The circuit arrangement comprises first power consuming circuitry which is arranged in parallel to the first capacitor. The first power consuming circuitry (113) consumes electrical power at a first voltage. The circuit arrangement comprises second power consuming circuitry which is arranged in parallel to the second capacitor. The second power consuming circuitry consumes electrical power at a second voltage, wherein a magnitude of the sum of the first voltage and the second voltage is smaller than an absolute difference between the high potential and the low potential. The circuit arrangement sets a voltage at the first capacitor in accordance to the first voltage and to set a voltage at the second capacitor in accordance to the second voltage.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: January 22, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Horst Knoedgen
  • Patent number: 10172557
    Abstract: A wearable biometric device includes a biometric sensor system adapted to measure a predetermined physiological property of a user's body at two or more different locations at the body surface and to provide for each such location an associated primary signal indicative of said measured physiological property. The device also includes a detector system adapted to detect a level of coupling of the biometric sensor system with the body at each of the locations and to provide for each of the locations an associated secondary signal indicative of said detected level of coupling and also includes a signal processing unit adapted to generate an output signal indicative of said physiological property as a function of the primary and secondary signals.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: January 8, 2019
    Assignee: DIALOG SEMICONDUCTOR (UK) LIMITED
    Inventors: Thomas Altebaeumer, Horst Knoedgen
  • Patent number: 10164532
    Abstract: A switched mode power converter comprising a main inductor and a half bridge for providing an inductor current is described. The power converter comprises a first output power switch for directing the inductor current to a first output port and bypass circuitry for making at least part of the inductor current available for controlling the switching state of at least one of the power switches. Furthermore, the power converter comprises a control unit configured to control the first output power switch such that the inductor current is directed to the first output port within different first time intervals. Furthermore, the bypass circuitry is controlled to make the inductor current available for controlling the switching state of the at least one power switch during a non-overlapping time interval.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: December 25, 2018
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Martin Faerber
  • Patent number: 10149354
    Abstract: A controller for a power converter to convert electrical power at an input voltage into electrical power at an output voltage and a method of operating such controller is presented. The controller for controlling a power converter has an input port to receive a voltage representative of the input voltage; an input voltage measuring unit to sample a measuring voltage and to determine a measurement value that is representative of the input voltage; a switch; and a diode connectable with a storage unit to provide a supply voltage for the controller during operation of the controller. The switch controls the charging of the storage unit from the voltage at the input port.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: December 4, 2018
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Julian Tyrrell