Patents by Inventor Jong Ki Nam

Jong Ki Nam 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).

  • Self refresh circuit for semiconductor memory device
    Patent number: 6597614
    Abstract: A self refresh circuit for a semiconductor memory device can reduce power consumption by varying a self refresh period according to a data holding time of a cell varied by a temperature. The self refresh circuit includes a temperature sensing unit for sensing a temperature, and generating a bias current for adjusting a self refresh period according to a data holding time of a memory cell varied by the temperature, and a ring oscillator unit for generating a pulse signal having a period actively varied according to the temperature by the bias current from the temperature sensing unit.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: July 22, 2003
    Assignee: Hynix Semiconductor Inc.
    Inventors: Jong Ki Nam, Jong Doo Joo
  • Self refresh circuit for semiconductor memory device
    Publication number: 20020018387
    Abstract: A self refresh circuit for a semiconductor memory device can reduce power consumption by varying a self refresh period according to a data holding time of a cell varied by a temperature. The self refresh circuit includes a temperature sensing unit for sensing a temperature, and generating a bias current for adjusting a self refresh period according to a data holding time of a memory cell varied by the temperature, and a ring oscillator unit for generating a pulse signal having a period actively varied according to the temperature by the bias current from the temperature sensing unit.
    Type: Application
    Filed: June 28, 2001
    Publication date: February 14, 2002
    Inventors: Jong Ki Nam, Jong Doo Joo