Patents by Inventor Larry Wayne True

Larry Wayne True 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).

  • ASIC with selectable output drivers
    Patent number: 5783963
    Abstract: An ASIC (5) has four driver circuits (19a-19d), each with different output power. One of those driver circuits is selected from the content of register (13) on the ASIC. The register content being decoded by a decoder (15) on the ASIC to a signal which activates a single one of the drivers. The register is loaded from an external microprocessor during each initialization of a printer (1) in which the ASIC is a component. The ASIC is designed with the range of the powers of the drivers bracketing the estimated needs of the load to be attached to the ASIC. This permits the ASIC to be completed only once, while the most suitable driver for the final load is determined subsequently and selected by the entry of data to activate that driver into the register with each initialization of the printer. The ASIC need not have nonvolatile memory and only a single set of ASIC masks and other design aspects need be completed.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: July 21, 1998
    Assignee: Lexmark International, Inc.
    Inventors: Sean Foster Garnett, Terry Lee Parker, John Parker Richey, Warren John Spina, Larry Wayne True