Patents by Inventor Stewart Carlton

Stewart Carlton 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).

  • System and method for reordering fragment data based upon rasterization direction
    Patent number: 6766410
    Abstract: A system and method for reordering data fragments to facilitate reads from a DDR SDRAM where the fragments are placed into a first and second data fragment buffer such that the data fragments are in sequential addresses whereby the second data read on the trailing edge of the clock cycle will read the proper data fragment.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: July 20, 2004
    Assignee: 3Dlabs, Inc., Ltd.
    Inventor: Stewart Carlton
  • System and method for optimizing performance in a four-bank SDRAM
    Patent number: 6667930
    Abstract: An enhanced checkerboard pattern for optimizing performance when accessing a four-bank SDRAM. The screen is mapped using the enhanced checkerboard pattern, and each enhanced checkerboard pattern is composed of 16 squares. The enhanced checkerboard is made from two basic blocks, each block having 4 squares, and each square representing a distinct memory bank. The two basic blocks are mirror image of each other.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: December 23, 2003
    Assignee: 3Dlabs, Inc., Ltd.
    Inventor: Stewart Carlton
  • Parallel phased switch control
    Patent number: 6597157
    Abstract: An integrated circuit controller for power conversion systems that provides for the control of parallel phased semiconductor switches without the need for separate filter inductors for each switch. The controller derivates two phased clock signals from a source clock, generates ramp signals, modulates ramp signals, and outputs phased gate drive signals to control parallel phased switches.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: July 22, 2003
    Assignee: 3DLabs, Inc., Ltd
    Inventors: Eduard F. Boeckmann, Stewart Carlton