Patents by Inventor Detlef Kalz

Detlef Kalz 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).

  • Power switching device
    Patent number: 6853232
    Abstract: A power switching device has a power switching transistor connected in series in a load circuit with an inductive load portion and a commutation circuit. The commutation circuit is connected in parallel with the gate-drain or base-collector path of the power transistor and has a first Zener diode, which determines the commutation clamping voltage for switching on the power switching transistor during commutation, and an oppositely biased normal diode that is connected in series with the first Zener diode. The commutation circuit further has control elements in order to reduce, during a short time, the commutation clamping voltage at the beginning of each commutation cycle or after an adjustable delay from the beginning of each commutation cycle.
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: February 8, 2005
    Assignee: Infineon Technologies AG
    Inventors: Rainald Sander, Frank Kahlmann, Veli Kartal, Detlef Kalz, Helmut Hertrich
  • Power switching device
    Publication number: 20040027756
    Abstract: A power switching device has a power switching transistor connected in series in a load circuit with an inductive load portion and a commutation circuit. The commutation circuit is connected in parallel with the gate-drain or base-collector path of the power transistor and has a first Zener diode, which determines the commutation clamping voltage for switching on the power switching transistor during commutation, and an oppositely biased normal diode that is connected in series with the first Zener diode. The commutation circuit further has control elements in order to reduce, during a short time, the commutation clamping voltage at the beginning of each commutation cycle or after an adjustable delay from the beginning of each commutation cycle.
    Type: Application
    Filed: May 27, 2003
    Publication date: February 12, 2004
    Inventors: Rainald Sander, Frank Kahlmann, Veli Kartal, Detlef Kalz, Helmut Hertrich