Patents by Inventor Hitoshi Tokura

Hitoshi Tokura 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).

  • Direct memory access control device for a ring buffer
    Patent number: 5787497
    Abstract: A DMA control device for generating an address value to a ring buffer according to the present invention is provided with an address generation circuit for generating address signals to the ring buffer sequentially by providing an initial value with an address value within a range where the ring buffer is set, and a corrected address generation circuit for initializing the address generation circuit by use of a value obtained by subtracting the total number of addresses of the ring buffer from an address value of the address signals generated from the address generation circuit when the address value of the address signals exceeds a final address of the ring buffer.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: July 28, 1998
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hitoshi Tokura, Jun Yamashita