Patents by Inventor Arun Achynthan

Arun Achynthan 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).

  • Patent number: 6141268
    Abstract: This invention describes a column redundancy arrangement in a DRAM that minimizes the timing difference between a normal and a redundant column path. A semiconductor memory device comprises memory elements arranged in rows and columns. The memory elements are accessed by energizing one or more rows and columns. A first and a second group of normal column drivers are provided for energizing associated normal memory columns in response to respective ones of column select signals. Further, a first and second redundant column driver are provided for energizing associated redundant memory columns upon receipt of a column select signal along a redundancy select line. A plurality of programmable switches are associated with the normal column drivers, for selectively steering respective ones of the column select signals to associated column drivers or the first or second of the redundant column drivers.
    Type: Grant
    Filed: July 7, 1999
    Date of Patent: October 31, 2000
    Assignee: Mosaid Technologies Incorporated
    Inventors: Lidong Chen, Arun Achynthan, John Wu