Patents by Inventor Ralph Griffin

Ralph Griffin 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).

  • Level shifted drive for clamp device
    Patent number: 6856523
    Abstract: A DC/DC converter device is provided that employs a clamp device to limit the peak voltage of a main power switch coupled to a primary winding of a transformer. The clamp device is driven employing a driver circuit coupled to a level shifter circuit. The level shifter circuit shifts the voltage level transitions of a clamp device drive signal from a first voltage level to a second voltage level range to drive the clamp device with a voltage that is outside a voltage range of an input supply voltage.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: February 15, 2005
    Assignee: Northrop Grumman Corporation
    Inventor: Ralph Griffin
  • LEVEL SHIFTED DRIVE FOR CLAMP DEVICE
    Publication number: 20040264217
    Abstract: A DC/DC converter device is provided that employs a clamp device to limit the peak voltage of a main power switch coupled to a primary winding of a transformer. The clamp device is driven employing a driver circuit coupled to a level shifter circuit. The level shifter circuit shifts the voltage level transitions of a clamp device drive signal from a first voltage level range to a second voltage level range to drive the clamp device with a voltage that is outside a voltage range of an input supply voltage.
    Type: Application
    Filed: June 30, 2003
    Publication date: December 30, 2004
    Inventor: Ralph Griffin