Patents Assigned to Patent-Treuhand-Gesellschaft für Elecktrisch Glühlampen mbH
  • Lamp operating circuit and operating method for a lamp having active current measurement
    Patent number: 7245086
    Abstract: The invention relates to a circuit and to a method for operating a lamp. In this case, a reactance for the purpose of detecting the lamp voltage, a zero point detection device for the purpose of determining the zero crossing of the current through the reactance and a current measuring device and, finally, a track-and-hold circuit triggered by the zero point detection device are used to measure the lamp current in such a way that the influence of parasitic capacitances is still ruled out.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: July 17, 2007
    Assignee: Patent-Treuhand-Gesellschaft für Elecktrisch Glühlampen mbH
    Inventor: Andreas Mitze