Patents by Inventor Marcel H. W. van de Westerlo

Marcel H. W. van de Westerlo 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 bias via transformer
    Patent number: 5731740
    Abstract: In an amplifier module circuit, an input transformer (TI) transforms an input signal (ISU) into a transformed input signal (ISB), which is supplied to a pair of amplifiers (AMPA, AMPB). In addition to windings (W1, W2) for input signal transformation, the core (CO) of the transformer (TI) is provided with an auxiliary winding (W3) for biasing the pair of amplifiers (AMPA, AMPB). A DC bias voltage (VB) is supplied to a tap (XT) on the auxiliary winding (W3) whose ends are DC coupled to the input transistors (QA, QB) of the pair of amplifiers (AMPA, AMPB).
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: March 24, 1998
    Assignee: U.S. Philips Corporation
    Inventor: Marcel H. W. van de Westerlo