Patents by Inventor Michael J. DeLurio

Michael J. DeLurio 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).

  • Voltage waveform generator
    Patent number: 6376934
    Abstract: A method and circuit for generating a voltage waveform across a capacitive load such as an electroluminescent device is described. The method includes the steps of charging and discharging the capacitive load using a constant current source. By sequentially performing the steps of providing a constant current through the capacitive load, eliminating the current, and discharging the capacitive load, a trapezoidal voltage waveform is achieved. In portable telephones and laptop computers with electroluminescent displays, the trapezoidal waveform results in reduced audible noise and power consumption.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: April 23, 2002
    Assignee: Sipex Corporation
    Inventor: Michael J. DeLurio
  • Compandor system with stable and widely adjustable unity gain level
    Patent number: 5179361
    Abstract: A compandor system is provided that uses integrated circuitry in combination with fully external controlling devices for unity gain level adjustment without affecting the dynamic range. In addition, the system's stability is maintained. The external control is provided, for instance, by replaceable discrete resistors.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: January 12, 1993
    Assignee: North American Philips Corp.
    Inventors: Nasrollah S. Navid, Michael J. DeLurio