Patents by Inventor Larry C. Tippie

Larry C. Tippie 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).

  • Junction field effect voltage reference
    Patent number: 5973550
    Abstract: A JFET pair having unequal pinchoff voltages is operated in saturation with equal source-drain current to channel width-to-length ratios to provide a reference voltage output. Positive or negative voltage references can be implemented using either n-channel or p-channel JFETs. The pinchoff voltage difference results from the channel for one JFET having a heavier doping level than that of the other JFET.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: October 26, 1999
    Assignee: Analog Devices, Inc.
    Inventors: Derek F. Bowers, Larry C. Tippie
  • Junction field effect voltage reference
    Patent number: 5838192
    Abstract: A JFET pair having unequal pinchoff voltages is operated in saturation with equal source-drain current to channel width-to-length ratios to provide a reference voltage output. Positive or negative voltage references can be implemented using either n-channel or p-channel JFETs. The pinchoff voltage difference results from the channel for one JFET having a heavier doping level than that of the other JFET.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: November 17, 1998
    Assignee: Analog Devices, Inc.
    Inventors: Derek F. Bowers, Larry C. Tippie