Patents by Inventor Detlef Ummelmann

Detlef Ummelmann 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).

  • Gate-driver circuit with improved common-mode transient immunity
    Patent number: 9923500
    Abstract: Techniques are described for providing, in a gate driver circuit, a compensation current to compensate for parasitic displacement current induced during the rising edge of an output voltage at an output gate of the gate driver circuit. In one example, the techniques of the disclosure include activating, by a bridge driver circuit for a direct-current (DC) motor, a driver of the bridge driver circuit and measuring, by the bridge driver circuit, a parasitic current of the driver during a rise time of an output gate voltage of the driver. In response to the measured parasitic current, generating, by the bridge driver circuit, a compensation current; and outputting, by the bridge driver circuit and to the output gate of the of the driver, the compensation current.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: March 20, 2018
    Assignee: Infineon Technologies AG
    Inventors: Detlef Ummelmann, Ansgar Pottbaecker
  • GATE-DRIVER CIRCUIT WITH IMPROVED COMMON-MODE TRANSIENT IMMUNITY
    Publication number: 20180076747
    Abstract: Techniques are described for providing, in a gate driver circuit, a compensation current to compensate for parasitic displacement current induced during the rising edge of an output voltage at an output gate of the gate driver circuit. In one example, the techniques of the disclosure include activating, by a bridge driver circuit for a direct-current (DC) motor, a driver of the bridge driver circuit and measuring, by the bridge driver circuit, a parasitic current of the driver during a rise time of an output gate voltage of the driver. In response to the measured parasitic current, generating, by the bridge driver circuit, a compensation current; and outputting, by the bridge driver circuit and to the output gate of the of the driver, the compensation current.
    Type: Application
    Filed: September 13, 2016
    Publication date: March 15, 2018
    Inventors: Detlef Ummelmann, Ansgar Pottbaecker
  • Wien-bridge oscillator and circuit arrangement for regulating a detuning
    Patent number: 9231520
    Abstract: An oscillator circuit includes a Wien-bridge oscillator. A non-detuned oscillating signal and a detuned oscillating signal are tapped from the Wien-bridge oscillator. A sum of a weighted detuned signal and a weighted non-detuned signal is coupled as feedback signal to the Wien-bridge to control the oscillation amplitude.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: January 5, 2016
    Assignee: Infineon Technologies AG
    Inventors: Detlef Ummelmann, Ansgar Pottbaecker
  • Wien-Bridge Oscillator and Circuit Arrangement for Regulating a Detuning
    Publication number: 20140285274
    Abstract: An oscillator circuit includes a Wien-bridge oscillator. A non-detuned oscillating signal and a detuned oscillating signal are tapped from the Wien-bridge oscillator. A sum of a weighted detuned signal and a weighted non-detuned signal is coupled as feedback signal to the Wien-bridge to control the oscillation amplitude.
    Type: Application
    Filed: March 21, 2013
    Publication date: September 25, 2014
    Applicant: Infineon Technologies AG
    Inventors: Detlef Ummelmann, Ansgar Pottbaecker
  • Switched-capacitor amplifier arrangement having a low input current
    Patent number: 7944288
    Abstract: An SC amplifier arrangement and a method for measuring an input voltage are described.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: May 17, 2011
    Assignee: Infineon Technologies AG
    Inventor: Detlef Ummelmann
  • Switched-capacitor amplifier arrangement having a low input current
    Publication number: 20100079204
    Abstract: An SC amplifier arrangement and a method for measuring an input voltage are described.
    Type: Application
    Filed: September 29, 2008
    Publication date: April 1, 2010
    Inventor: Detlef Ummelmann