Patents by Inventor Daniel Mark Nelson

Daniel Mark Nelson 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).

  • Publication number: 20090323445
    Abstract: A design structure embodied in a machine readable medium used in a design process and an integrated circuit for high performance SRAM (Static Random Access Memory) read bypass for BIST (built-in self-test). The design structure and integrated structure includes a dynamic to static conversion unit for a read output of an SRAM array, and a test bypass unit integrated into the dynamic to static conversion unit, so as to allow the read output of the SRAM array to pass through in a non-test mode without impacting performance, and bypass the read output of the SRAM array and allow a test signal to pass though in a test mode.
    Type: Application
    Filed: June 26, 2008
    Publication date: December 31, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Chad Allen Adams, Derick Gardner Behrends, Daniel Mark Nelson, Jeffrey Milton Scherer
  • Publication number: 20090116298
    Abstract: A SRAM cell write performance evaluation circuit includes a SRAM core where each wordline is connected to only one bit column. A ring oscillator circuit is used to generate wordline pulses. A state machine controls operations for the SRAM cell write performance evaluation circuit including the ring oscillator circuit and the SRAM core. A control signal is applied to the state machine to select a first write operation, where the circuit simultaneously writes all the cells to a known state with wide wordlines to ensure all cells are written. Then a second write operation is selected, and all the wordlines are launched simultaneously to write the cells to the opposite state. From these write operations, a required wordline pulse width to write the cell is identified.
    Type: Application
    Filed: January 12, 2009
    Publication date: May 7, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Chad Allen Adams, Derick Gardner Behrends, Travis Reynold Hebig, Daniel Mark Nelson
  • Patent number: 7505340
    Abstract: A method implements static random access memory (SRAM) cell write performance evaluation. A SRAM cell write performance evaluation circuit includes a SRAM core where each wordline is connected to only one bit column. A ring oscillator circuit is used to generate wordline pulses. A state machine controls operations for the SRAM cell write performance evaluation circuit including the ring oscillator circuit and the SRAM core. A control signal is applied to the state machine to select a first write operation, where the circuit simultaneously writes all the cells to a known state with wide wordlines to ensure all cells are written. Then a second write operation is selected, and all the wordlines are launched simultaneously to write the cells to the opposite state. From these write operations, a required wordline pulse width to write the cell is identified.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: March 17, 2009
    Assignee: International Business Machines Corporation
    Inventors: Chad Allen Adams, Derick Gardner Behrends, Travis Reynold Hebig, Daniel Mark Nelson
  • Publication number: 20090059697
    Abstract: A SRAM cell write performance evaluation circuit includes a SRAM core where each wordline is connected to only one bit column. A ring oscillator circuit is used to generate wordline pulses. A state machine controls operations for the SRAM cell write performance evaluation circuit including the ring oscillator circuit and the SRAM core. A control signal is applied to the state machine to select a first write operation, where the circuit simultaneously writes all the cells to a known state with wide wordlines to ensure all cells are written. Then a second write operation is selected, and all the wordlines are launched simultaneously to write the cells to the opposite state. From these write operations, a required wordline pulse width to write the cell is identified.
    Type: Application
    Filed: August 28, 2007
    Publication date: March 5, 2009
    Inventors: Chad Allen Adams, Derick Gardner Behrends, Travis Reynold Hebig, Daniel Mark Nelson
  • Publication number: 20090063912
    Abstract: A method and apparatus for implementing static random access memory (SRAM) cell write performance evaluation, and a design structure on which the subject circuit resides are provided. ASRAM core includes each wordline connected to only one bit column. A ring oscillator circuit is used to generate wordline pulses. A state machine controls operations for the SRAM cell write performance evaluation circuit including the ring oscillator circuit and the SRAM core. A control signal is applied to the state machine to select a first write operation, where the circuit simultaneously writes all the cells to a known state with wide wordlines to ensure all cells are written. Then a second write operation is selected, and all the wordlines are launched simultaneously to write the cells to the opposite state. From these write operations, a required wordline pulse width to write the cell is identified.
    Type: Application
    Filed: October 16, 2007
    Publication date: March 5, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Chad Allen Adams, Derick Gardner Behrends, Travis Reynold Hebig, Daniel Mark Nelson
  • Publication number: 20080273406
    Abstract: A method and enhanced Static Random Access Memory (SRAM) redundancy circuit reduce wiring and the required number of redundant elements. A bitline redundancy mechanism allows the swapping of a pair of bitlines for a redundant pair of bit columns. Two of the adjacent bitlines are swapped out at a time, one even and one odd. The swap is accomplished by steering the data around the bad columns and adding redundant columns on the end that are steered in when needed.
    Type: Application
    Filed: July 14, 2008
    Publication date: November 6, 2008
    Applicant: International Business Machines Corporation
    Inventors: Derick Gardner Behrends, Peter Thomas Freiburger, Ryan Charles Kivimagi, Daniel Mark Nelson
  • Patent number: 7443744
    Abstract: A method and enhanced Static Random Access Memory (SRAM) redundancy circuit reduce wiring and the required number of redundant elements. A bitline redundancy mechanism allows the swapping of a pair of bitlines for a redundant pair of bit columns. Two of the adjacent bitlines are swapped out at a time, one even and one odd. The swap is accomplished by steering the data around the bad columns and adding redundant columns on the end that are steered in when needed.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: October 28, 2008
    Assignee: International Business Machines Corporation
    Inventors: Derick Gardner Behrends, Peter Thomas Freiburger, Ryan Charles Kivimagi, Daniel Mark Nelson
  • Publication number: 20080112237
    Abstract: A method and enhanced Static Random Access Memory (SRAM) redundancy circuit reduce wiring and the required number of redundant elements. A bitline redundancy mechanism allows the swapping of a pair of bitlines for a redundant pair of bit columns. Two of the adjacent bitlines are swapped out at a time, one even and one odd. The swap is accomplished by steering the data around the bad columns and adding redundant columns on the end that are steered in when needed.
    Type: Application
    Filed: November 14, 2006
    Publication date: May 15, 2008
    Inventors: Derick Gardner Behrends, Peter Thomas Freiburger, Ryan Charles Kivimagi, Daniel Mark Nelson
  • Publication number: 20080112219
    Abstract: A method and enhanced Static Random Access Memory (SRAM) redundancy circuit reduce wiring and the required number of redundant elements, and a design structure on which the subject SRAM redundancy circuit resides is provided. A bitline redundancy mechanism allows the swapping of a pair of bitlines for a redundant pair of bit columns. Two of the adjacent bitlines are swapped out at a time, one even and one odd. The swap is accomplished by steering the data around the bad columns and adding redundant columns on the end that are steered in when needed.
    Type: Application
    Filed: October 8, 2007
    Publication date: May 15, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Derick Gardner Behrends, Peter Thomas Freiburger, Ryan Charles Kivimagi, Daniel Mark Nelson