Patents by Inventor Bennie I. P. Simpelaar

Bennie I. P. Simpelaar 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 arrangement
    Patent number: 6417630
    Abstract: A ballast circuit for operating a lamp having preheatable electrodes. The frequency of a high frequency bridge inverter is controlled by a control circuit which has input connections to one of the lamp electrodes for monitoring the electrode temperature. The voltage across the lamp electrode controls oscillation frequency during preheating and ignition.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: July 9, 2002
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Bennie I. P. Simpelaar