Patents by Inventor Peter D. Gardner

Peter D. Gardner 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).

  • Crisscross voltage level shifter
    Patent number: 6002290
    Abstract: A crisscross level shifter comprising a pull-down circuit configured as a pair of cascode amplifiers and a crisscross pull-up circuit. The cascode amplifiers are enhanced by a feedforward circuit coupling, for both amplifiers, the input of one cascode amplifier to the output of the other cascode amplifier.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: December 14, 1999
    Assignees: Sarnoff Corporation, Sharp Corporation
    Inventors: Leslie Ronald Avery, Peter D. Gardner
  • P-I-N photodetector having a burried junction
    Patent number: 4887138
    Abstract: A P-I-N photodetector is fabricated having a first upper light transmitting n.sup.- InP layer overlaying a second light absorbing layer of n.sup.- GaInAs in turn overlaying a substrate of n+InP or N+GaAs, together with p+ ion implant zones formed within the first layer which completely penetrate the first layer and partially penetrate the second layer to form a buried junction within the second layer, the junction being exposed to ambient air. The implants are preferably formed by ion implantation of Be, Cd, Zn or Mg.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: December 12, 1989
    Assignee: The United States of America as represented by the Secetary of the Air Force
    Inventor: Peter D. Gardner