Patents by Inventor Michael Gordon Gallup

Michael Gordon Gallup 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).

  • Data processor having an output terminal with selectable output impedances
    Patent number: 5859541
    Abstract: A data processor has at least one output terminal which a user of the data processor can vary the output impedance thereof depending upon the application environment of the data processor. A first output buffer of an output buffer stage has a predetermined output impedance and is coupled between an input of the stage and the output terminal. The first output buffer provides a first output terminal impedance. A second output buffer having a lower output impedance than the first output buffer may be selectively coupled in parallel to the first output buffer to reduce the output impedance of the output terminal. The coupling of the output buffers is controlled by a user of the data processor who provides a control input for selecting one of a plurality of predetermined output terminal impedance values.
    Type: Grant
    Filed: September 15, 1993
    Date of Patent: January 12, 1999
    Assignee: Motorola, Inc.
    Inventors: Steven Craig McMahan, Kenneth Charles Scheuer, William Burl Ledbetter, Jr., Michael Gordon Gallup, James George Gay