Patents by Inventor Derek R. Johnson

Derek R. Johnson 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).

  • Memory having selectable output strength
    Patent number: 5864506
    Abstract: An output buffer circuit of a semiconductor memory device can produce multiple output buffer drive strengths. An electronic system including a memory device in which such an output buffer circuit is implemented can include a mechanism for enabling the output buffer drive strength to be easily selected by a user of the memory device (such as an assembler of an electronic system including the memory device) from the multiple possible drive strengths. The invention thus enables a memory device to be easily configured to have an output buffer drive strength that is compatible with a wide variety of electrical loads to be driven by the output buffers of the memory device.
    Type: Grant
    Filed: January 14, 1998
    Date of Patent: January 26, 1999
    Assignee: Cypress Semiconductor Corporation
    Inventors: Mathew R. Arcoleo, Raymond M. Leong, Derek R. Johnson
  • Memory having selectable output strength
    Patent number: 5732027
    Abstract: An output buffer circuit of a semiconductor memory device can produce multiple output buffer drive strengths. An electronic system including a memory device in which such an output buffer circuit is implemented can include a mechanism for enabling the output buffer drive strength to be easily selected by a user of the memory device (such as an assembler of an electronic system including the memory device) from the multiple possible drive strengths. The invention thus enables a memory device to be easily configured to have an output buffer drive strength that is compatible with a wide variety of electrical loads to be driven by the output buffers of the memory device.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: March 24, 1998
    Assignee: Cypress Semiconductor Corporation
    Inventors: Mathew R. Arcoleo, Raymond M. Leong, Derek R. Johnson