Patents by Inventor Alexander M. Griessing

Alexander M. Griessing 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).

  • Arithmetic logic unit with merged circuitry for comparison, minimum/maximum selection and saturation for signed and unsigned numbers
    Patent number: 7461118
    Abstract: A saturation-capable arithmetic logic unit (ALU) includes a general-purpose comparator coupled to receive a data value and a saturation threshold value during a saturation operation. Using the general-purpose comparator of the ALU for saturation minimizes circuit area without adversely affecting microprocessor performance. In an unsigned saturation operation, the data value is replaced with the threshold value when the data value is greater than the threshold value. In a signed saturation operation, positive data values are compared with an upper threshold value and negative data values are compared with a lower threshold value. In this manner, the data value need only be compared to either the upper or lower threshold value, rather than both. If the data value falls outside the bounds set by the upper and lower threshold values, the data value is replaced with the nearest threshold value.
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: December 2, 2008
    Assignee: Infineon Technologies AG
    Inventor: Alexander M. Griessing
  • New arithmetic logic unit with merged circuitry for comparison, minimum/maximum selection and saturation for signed and unsigned numbers
    Publication number: 20040205094
    Abstract: A saturation-capable arithmetic logic unit (ALU) includes a general-purpose comparator coupled to receive a data value and a saturation threshold value during a saturation operation. Using the general-purpose comparator of the ALU for saturation minimizes circuit area without adversely affecting microprocessor performance. In an unsigned saturation operation, the data value is replaced with the threshold value when the data value is greater than the threshold value. In a signed saturation operation, positive data values are compared with an upper threshold value and negative data values are compared with a lower threshold value. In this manner, the data value need only be compared to either the upper or lower threshold value, rather than both. If the data value falls outside the bounds set by the upper and lower threshold values, the data value is replaced with the nearest threshold value.
    Type: Application
    Filed: April 9, 2003
    Publication date: October 14, 2004
    Applicant: Infineon Technologies North America Corp.
    Inventor: Alexander M. Griessing