Patents by Inventor Donald Katsu Umemto

Donald Katsu Umemto 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).

  • Low noise-high linearity HEMT-HBT composite
    Patent number: 5838031
    Abstract: 4-terminal HEMT-HBT composite devices, based upon monolithically integrated HEMT-HBT technology and configured in various topologies, are useful in a wide range of applications which currently utilize discrete MMICs. In particular, the 4-terminal topologies are easily configured as 3-terminal composite devices useful in various 2-port and 3-port MMIC circuit applications, such as low noise-high linearity amplifiers as well as mixers, which provide the benefits of a reduction in size, as well as corresponding cost while providing better performance than utilizing either HEMT or HBT devices individually.
    Type: Grant
    Filed: March 5, 1996
    Date of Patent: November 17, 1998
    Assignee: TRW Inc.
    Inventors: Kevin Wesley Kobayashi, Dwight Christopher Streit, Aaron Kenji Oki, Donald Katsu Umemto