Patents by Inventor Niels O. Jacobsen

Niels O. Jacobsen 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).

  • Low power loss snubber for switching power transistors
    Patent number: 4572969
    Abstract: The invention relates to an electronic switching circuit having a power transistor controlled by a control stage. During the "on" time for the transistor a capacitor of a switch off relief circuit is charged and at "turn-off" time the capacitor is discharged through the base-emitter path of the power transistor. The charge of the capacitor is thus utilized to produce a strong base current surge during switching on of the power transistor so as to operate the power transistor rapidly and thereby reduce the power loss of its switching path.
    Type: Grant
    Filed: October 3, 1983
    Date of Patent: February 25, 1986
    Assignee: Danfoss A/S
    Inventors: Kjeld Hellegaard, Hans Doktor, Niels O. Jacobsen