Patents by Inventor Elke Ferner

Elke Ferner 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).

  • Circuit and method for suppressing audio noise in DC-DC converters
    Patent number: 10615694
    Abstract: A solution is provided for suppressing audio noise in a DC-DC switching converter. A means for limiting the minimum switching frequency of a pulse-frequency modulation (PFM) control is described. A first order gm amplifier dissipates the excess energy added to the inductor, when magnetizing at faster rate than the native PFM. A higher resistance, low-side scaled switch helps reduce wasted energy losses. The low-side scaled switch reduces the rise in the inductor current during magnetization, and hence keeps efficiency up at low loads, when the PFM minimum switching frequency is active.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: April 7, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Louis de Marco, Kemal Ozanoglu, Elke Ferner, Slawomir Malinowski
  • Circuit and Method for Suppressing Audio Noise in DC-DC Converters
    Publication number: 20200083809
    Abstract: A solution is provided for suppressing audio noise in a DC-DC switching converter. A means for limiting the minimum switching frequency of a pulse-frequency modulation (PFM) control is described. A first order gm amplifier dissipates the excess energy added to the inductor, when magnetizing at faster rate than the native PFM. A higher resistance, low-side scaled switch helps reduce wasted energy losses. The low-side scaled switch reduces the rise in the inductor current during magnetization, and hence keeps efficiency up at low loads, when the PFM minimum switching frequency is active.
    Type: Application
    Filed: September 7, 2018
    Publication date: March 12, 2020
    Inventors: Louis de Marco, Kemal Ozanoglu, Elke Ferner, Slawomir Malinowski